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Choosing the best tank mates for Oscars can be a bit of a challenge because not all fish species can live peacefully with Oscar fish, and some may even end up becoming a snack!
Oscars (Astronotus ocellatus) are a type of cichlid fish native to the Amazon River basin in South America. They are beautiful and intelligent fish that is a popular choice for hobbyists due to their unique personalities and stunning appearance. Renowned for their distinctive coloring, which can range from gray to black with orange or red accents. Oscars are also known for their large size, as they can grow up to 18 inches long in captivity.
Aside from their physical appearance, Oscars are also fascinating fish to observe due to their behavior. They are highly interactive and will often recognize their owners, responding to their presence by coming to the front of the tank to beg for food or attention.
So, exactly what fish can live with Oscars? Before I answer that, let’s explore some important considerations for compatible Oscar fish tank mates. So if you’re thinking about adding introducing a fish to live with your Oscar in its aquarium, keep reading to find out the right compatible fish breeds
Do Oscar Fish Need Tank Mates?
Oscar fish do not necessarily need tank mates, but they can coexist with certain species of fish in a tank if certain conditions are met.
Oscars are known for their aggressive and territorial behavior, so it’s crucial to select compatible tank mates that can withstand and live with their aggression. When choosing tank mates for Oscars, it’s best to consider fish species that are similar in size, temperament, and water requirements so they can coexist peacefully with Oscars without becoming prey or engaging in aggression.
To introduce a new compatible Oscar fish tank mates, you’ll need a large tank with adequate space and hiding places to reduce stress and territorial disputes. It’s also essential to maintain stable water parameters, including temperature, pH, and water hardness, to ensure the health of both Oscars and their tank mates.
Choosing Compatible Tank Mates For Oscar Fish
So, you’re interested in finding some suitable tank mates for your Oscars? That’s great! But before you start picking out new fish to add to your aquarium, it’s important to consider Oscar fish compatibility with the fish and some of the other factors below to ensure that you are choosing compatible tank mates.
- The size of your tank
- The water parameters required by your Oscars
- The temperament of your Oscars
- The size and behavior of potential tank mates
Tank size and space requirements:
Firstly, you need to think about the tank size and space requirements. You need to have around 75 gallons of water per Oscar fish, and at least 125 gallons for a pair of Oscar fish tank mates or other breed mates. Oscars can grow quite large, and they need plenty of swimming space. So, make sure you have a tank that’s big enough to accommodate your Oscars and any potential tank mates.
You should also provide plenty of hiding places and territories within the tank to prevent aggression and stress.
Water Parameters
Water parameters are another important factor when considering Oscar fish tank mates. Since Oscars are South American cichlids, they prefer soft, slightly acidic water with a pH of around 6.5-7.5 and a water hardness of 5-20 dGH. Oscars are tropical fish, so the water temperature is always kept between 74-81°F. When choosing tank mates for Oscars, it’s important to select fish that can tolerate and live with these water conditions.
Temperament Of Oscars
The temperament of your Oscars is also crucial to consider. Oscars are aggressive fish that can be territorial and may attack smaller or more docile tank mates, especially during breeding and mating season. So you need to choose tank mates that won’t provoke or intimidate them. It’s best to avoid fish that are also aggressive, territorial, and similar in size or appearance to your Oscars, as they may see them as a threat.
The Size And Behavior Of Potential Tank Mates
Of course! Another important factor to consider when choosing tank mates for your Oscars is the size and behavior of the potential fish. Oscars can grow quite large, so you’ll need to choose tank mates that are either a little similar in size or large enough to not be seen as prey.
When selecting potential Oscar tank mates, you should research the adult size of the fish to ensure that they’ll have enough space in your aquarium. For example, Jack Dempseys can grow up to 10-15 inches in length, so they require a tank that’s at least 75 gallons. Similarly, Plecos can grow up to 24 inches in length, so they’ll need plenty of swimming space.
It’s also important for you to consider the activity level of the potential tank mates. Fish that are constantly swimming around and active may stress out your Oscars, so it’s best to choose fish that are more sedate or peaceful.
By selecting oscar fish tank mates that are similar in size, peaceful in temperament, and have similar water requirements, you can create a thriving and harmonious aquarium environment for your Oscars and other fish.
Can Oscar Fish Live Together?
Yes, Oscar fish can live together in the same tank, but you should be aware that Oscars are large and aggressive fish, especially during the breeding season, so to minimize aggression, you’ll require a spacious tank with plenty of hiding places and territories to establish their dominance.
When keeping multiple Oscars together, it’s crucial to ensure that the tank size is big enough to accommodate their size and behavior. A minimum tank size of 75 gallons is recommended for two Oscars, and additional 50 gallons for each additional Oscar. It’s also essential to provide adequate filtration and regular water changes to maintain good water quality.
Here Are 28 Fishes That Can Live With Oscars (Oscar Tank Mates List)
Aside from living with themselves, you are probably still wondering what fish can live with Oscars. So, here is the list of 28 other fishes that can live as compatible tank mates for Oscars:
- Convict Cichlid (Amatitlania nigrofasciata)
- Jack Dempsey (Rocio octofasciata)
- Green Terror Cichlid (Andinoacara rivulatus)
- Silver Dollars (Metynnis argenteus)
- Jaguar Cichlid (Parachromis managuensis)
- Cichlasoma (Cichlasoma Dimerus)
- Plecostomus (Hypostomus plecostomus)
- Firemouth Cichlid (Thorichthys meeki)
- Jewel Cichlid (Hemichromis bimaculatus)
- Blood Parrot Fish (Amphilophus citrinellus x Paraneetroplus synspilus)
- Bala Shark (Balantiocheilos melanopterus)
- Red Tail Shark (Epalzeorhynchos bicolor)
- Clown Loaches (Chromobotia macracanthus)
- Reedfish (Erpetoichthys calabaricus)
- Black Ghost Knife Fish (Apteronotus albifrons)
- Severums (Heros severus)
- Fire Eel (Mastacembelus erythrotaenia)
- Red Parrot (Cichlasoma spp. x Amphilophus spp.)
- Giant Gourami (Osphronemus goramy)
- Blue Acaras (Aequidens pulcher)
- Bichir (Polypterus spp.)
- Silver Arowana (Osteoglossum bicirrhosum)
- Firemouths (Thorichthys spp.)
- Pictus Catfish (Pimelodus pictus)
- Loricariidae (Loricariidae spp.)
- Tinfoil Barb (Barbonymus schwanenfeldii)
- Black Spotted Eel (Mastacembelus dayi)
- Rainbow Cichlids (Herotilapia multispinosa)
1: Convict Cichlid
| Fish Name | Convict Cichlid |
| Scientific Name | Amatitlania nigrofasciata |
| Origin | Central America |
| Adult Size | 4-6 inches (10-15 cm) |
| Diet Type | Omnivore |
| Temperament | Aggressive |
| Needed Water Temperature | 72-82°F (22-28°C) |
| Optimum Tank Size | 30 gallons (113.5 liters) |
| Care Level | Easy |
Convict cichlids are a great tank mate for Oscars because they are tough and can hold their own. They are native to Central America and are known for their aggressive behavior. However, they are also known for their hardiness and adaptability, making them a good choice for a tank with Oscar fish. Convict cichlids are also small enough to coexist with Oscars without becoming prey, and their bold coloring provides an interesting contrast to the Oscars’ more muted colors.
2: Jack Dempsey
| Fish Name | Jack Dempsey |
| Scientific Name | Rocio octofasciata |
| Origin | Central America |
| Adult Size | 8-10 inches (20-25 cm) |
| Diet Type | Omnivore |
| Temperament | Aggressive |
| Needed Water Temperature | 75-85°F (24-29°C) |
| Optimum Tank Size | 50 gallons (189.3 liters) |
| Care Level | Moderate |
Jack Dempseys are another Central American cichlid that can be a good tank mate for Oscars. They are similar in size and temperament to Oscars so can handle the drama of coexisting with them. Jack Dempseys are also known for their beautiful coloring and distinctive facial markings, making them a visually appealing addition to a tank. However, it’s important to note that Jack Dempseys can be aggressive towards other fish.
3: Green Terror Cichlid
| Fish Name | Green Terror Cichlid |
| Scientific Name | Andinoacara rivulatus |
| Origin | South America |
| Adult Size | 8-10 inches (20-25 cm) |
| Diet Type | Omnivore |
| Temperament | Aggressive |
| Needed Water Temperature | 72-82°F (22-28°C) |
| Optimum Tank Size | 50 gallons (189.3 liters) |
| Care Level | Moderate |
Green terror cichlids are also native to Central America and can make good tank mates for Oscars. They are similar in size and temperament to Oscars and can handle the roughhousing of coexisting with these fish. Green terror cichlids are also known for their beautiful green coloring and distinctive tail fin, making them a visually appealing addition to a tank. However, it’s important to note that green terror cichlids can be aggressive towards other fish, so they should only be kept with Oscars or other large, aggressive fish of the same size.
4: Silver Dollars
| Fish Name | Silver Dollars |
| Scientific Name | Metynnis argenteus |
| Origin | South America |
| Adult Size | 6-8 inches (15-20 cm) |
| Diet Type | Herbivore |
| Temperament | Peaceful |
| Needed Water Temperature | 72-82°F (22-28°C) |
| Optimum Tank Size | 75 gallons (283.9 liters) |
| Care Level | Easy |
Silver dollars are a peaceful schooling fish that can make good tank mates for Oscars. They are native to South America and are known for their distinctive silver coloring and round shape. Silver dollars are also relatively large, growing up to eight inches in size, which makes them less likely to become prey for Oscars. Their peaceful nature and schooling behavior can also help to balance out the aggression of the Oscars in the tank.
5: Jaguar Cichlid
| Fish Name | Jaguar Cichlid |
| Scientific Name | Parachromis managuensis |
| Origin | Central America |
| Adult Size | 14-16 inches (35-40 cm) |
| Diet Type | Carnivore |
| Temperament | Aggressive |
| Needed Water Temperature | 75-80°F (24-27°C) |
| Optimum Tank Size | 100 gallons (378.5 liters) |
| Care Level | Difficult |
Jaguar cichlids are another Central American cichlid that can be a good tank mate for Oscars. They are similar in size and temperament to Oscars and can handle the roughhousing that comes with coexisting with these fish. Jaguar cichlids are also known for their beautiful, spotted pattern and their aggressive behavior. However, their aggression can be a good match for Oscars, which can also be aggressive and territorial.
6: Cichlasoma (Cichlasoma Dimerus)
| Fish Name | Cichlasoma |
| Scientific Name | Cichlasoma dimerus |
| Origin | Central and South America |
| Adult Size | 6-7 inches (15-18 cm) |
| Diet Type | Omnivore |
| Temperament | Semi-Aggresive |
| Needed Water Temperature | 72-82°F (22-28°C) |
| Optimum Tank Size | 50 gallons (189.3 liters) |
| Care Level | Easy |
Cichlasoma dimerus, also known as the dwarf cichlid or the thick-lipped eartheater, is a great tank mate for oscars. This South American cichlid is an omnivore, just like oscars, and can thrive on a varied diet of pellets, frozen or live food. They have a semi-aggressive temperament, which makes them a good match for the similarly aggressive and territorial oscars. However, they are not as large as oscars and can coexist in the same tank without competing for resources or causing harm to each other.
Cichlasoma dimerus can also help to balance out the aggression in an oscar tank by keeping to themselves and not picking fights. They can occupy the lower and mid-level areas of the tank, while oscars swim around in the upper regions. With an optimum tank size of 50 gallons, they don’t require too much space and can easily fit into an oscar tank.
7: Plecostomus
| Fish Name | Plecostomus |
| Scientific Name | Hypostomus plecostomus |
| Origin | South America |
| Adult Size | 10-24 inches (25-60 cm) |
| Diet Type | Herbivore |
| Temperament | Peaceful |
| Needed Water Temperature | 72-82°F (22-28°C) |
| Optimum Tank Size | 75 gallons (283.9 liters) |
| Care Level | Easy |
Plecostomus, also known as plecos, are hardy fish that can grow up to 24 inches (60 cm) in length. They are one of the best cleaner fish for Oscar tank known for their ability to help keep aquariums clean by feeding on algae and other debris. Their docile nature makes them compatible tank mates for Oscar fish. Plecos can tolerate a wide range of water parameters and are relatively low maintenance. However, they do require a large tank due to their size and high waste production.
When keeping Plecos with Oscars, it is important to ensure that the tank is large enough to accommodate both species. Plecos are nocturnal and prefer to hide during the day, so providing them with plenty of hiding places, such as caves and driftwood, is important. Additionally, Plecos can be territorial towards other bottom-dwelling fish, so it is recommended to only keep one Pleco per tank.
8: Firemouth Cichlid
| Fish Name | Firemouth Cichlid |
| Scientific Name | Thorichthys meeki |
| Origin | Central America |
| Adult Size | 6 inches (15 cm) |
| Diet Type | Omnivore |
| Temperament | Semi-aggressive |
| Needed Water Temperature | 75-86°F (24-30°C) |
| Optimum Tank Size | 50 gallons (189.3 liters) |
| Care Level | Easy |
Firemouth cichlids are native to Central America, including Mexico, Guatemala, and Belize. They are typically small in size, growing to about 6 inches in length. Firemouth cichlids have a red-orange coloration around their throat and underbelly, which makes them easily identifiable. They are generally peaceful fish but can become territorial during their breeding season.
Firemouth cichlids are compatible with Oscar fish because they are semi-aggressive, so they can hold their own in the tank. They are also very hardy fish and can tolerate a wide range of water parameters, making them a good choice for beginner fish keepers. Additionally, Firemouth Cichlids occupy the middle and bottom levels of the tank, which helps to balance out the Oscar fish’s tendency to stay near the top.
9: Jewel Cichlid
| Fish Name | Jewel Cichlid |
| Scientific Name | Hemichromis bimaculatus |
| Origin | West Africa |
| Adult Size | 5-6 inches (12-15 cm) |
| Diet Type | Omnivore |
| Temperament | Aggressive |
| Needed Water Temperature | 72-82°F (22-28°C) |
| Optimum Tank Size | 30 gallons (113.5 liters) |
| Care Level | Moderate |
Oscar tank mates like the Jewel cichlids are native to Africa, specifically the rivers of West Africa. They are small to medium-sized fish, growing up to 6 inches in length. Jewel cichlids are named for their bright, jewel-like coloration, which includes a deep red or orange body with blue-green spots. They are known for their aggressive behavior, especially during the breeding season just like the Oscars.
Jewel cichlids are compatible with Oscar fish because they are also aggressive fish and can hold their own in the tank making them one of the best tank mates for Oscars. Additionally, their bright coloration can add a pop of color to the tank and make for an interesting display. However, it is important to note that the tank should be large enough to provide enough space for both the Oscar fish and jewel cichlids to establish their own territories.
10: Blood Parrot Fish
| Fish Name | Blood Parrot Fish |
| Scientific Name | N/A (man-made hybrid) |
| Origin | Taiwan |
| Adult Size | 8-10 inches (20-25 cm) |
| Diet Type | Omnivore |
| Temperament | Peaceful |
| Needed Water Temperature | 72-82°F (22-28°C) |
| Optimum Tank Size | 50 gallons (189.3 liters) |
| Care Level | Easy |
Blood parrot fish are a hybrid species created from a cross between Amphilophus Citrinellus and Paraneetroplus Synspilus. They are popular aquarium fish due to their unique appearance, which includes a round, parrot-like head, and bright orange-red coloration. Blood parrot fish are generally peaceful, although they can become aggressive during the breeding season.
Blood parrot fish are compatible with Oscar fish because they are peaceful and can coexist well in a community tank. Additionally, their unique appearance can make for an interesting addition to the tank. However, it is important to note that blood parrot fish has a unique mouth structure that can make it difficult for them to eat certain types of food, so care should be taken to ensure that they are getting a well-balanced diet.
11: Bala Shark
| Fish Name | Bala Shark |
| Scientific Name | Balantiocheilos melanopterus |
| Origin | Southeast Asia |
| Adult Size | 12-14 inches (30-35 cm) |
| Diet Type | Omnivore |
| Temperament | Peaceful |
| Needed Water Temperature | 73-82°F (23-28°C) |
| Optimum Tank Size | 125 gallons (473.2 liters) |
| Care Level | Moderate |
Bala sharks are native to Southeast Asia, specifically the Mekong and Chao Phraya River basins. They are relatively large fish, growing up to 14 inches in length. Bala sharks are known for their torpedo-like shape and silver coloration with black tips on their fins. They are generally peaceful and can coexist well with other fish.
Bala sharks are compatible with Oscar fish because they are peaceful and can tolerate the Oscar fish’s aggressive behavior. Additionally, their large size can make for an interesting addition to the tank. However, it is important to note that Bala sharks require a large tank with plenty of swimming space, as they are active swimmers.
12: Red Tail Shark
| Fish Name | Red Tail Shark |
| Scientific Name | Epalzeorhynchos bicolor |
| Origin | Thailand |
| Adult Size | 5-6 inches (12-15 cm) |
| Diet Type | Omnivore |
| Temperament | Aggressive |
| Needed Water Temperature | 72-79°F (22-26°C) |
| Optimum Tank Size | 50 gallons (189.3 liters) |
| Care Level | Easy |
The Red Tail Shark is a peaceful fish that can coexist with Oscar fish. They are bottom dwellers that usually occupy the lower levels of the tank, which is ideal since Oscars spend most of their time swimming in the middle and upper levels of the tank. The Red Tail Shark is also a hardy fish that can tolerate a wide range of water parameters, which makes it an excellent choice for novice aquarium keepers. They prefer a well-established aquarium with plenty of hiding spots such as rocks, driftwood, and caves.
In terms of appearance, the Red Tail Shark has a sleek body with black or dark brown coloration and a vibrant red tail. They are relatively small, growing up to 6 inches (15 cm) in length, which means they won’t compete with Oscars for space in the tank. However, it’s essential to note that Red Tail Sharks can be territorial, so it’s crucial to ensure that the tank is large enough to accommodate both species comfortably. A tank size of at least 75 gallons (284 liters) is recommended for keeping Red Tail Sharks with Oscar fish.
13: Clown Loaches
| Fish Name | Clown Loaches |
| Scientific Name | Chromobotia macracanthus |
| Origin | Southeast Asia |
| Adult Size | 12 inches (30 cm) |
| Diet Type | Omnivore |
| Temperament | Peaceful |
| Needed Water Temperature | 75-86°F (24-30°C) |
| Optimum Tank Size | 75 gallons (283.9 liters) |
| Care Level | Moderate |
Oscar tank mates like the Clown Loaches are also one of the best cleaner fish for Oscar tanks that are popular among aquarium enthusiasts for their striking appearance and peaceful temperament. They are bottom-dwelling fish that can help keep the tank clean by eating leftover food and detritus. In terms of compatibility with Oscar fish, Clown Loaches can be an excellent choice since they are not aggressive and have a peaceful disposition. They prefer to live in groups of at least 6-8 individuals, making them a great addition to a community tank.
Clown Loaches can grow up to 12 inches (30 cm) in length, so a large tank of at least 75 gallons (283.9 liters) is necessary to accommodate their size. They prefer well-aerated water with a pH range of 6.5-7.5 and a temperature range of 75-86°F (24-30°C). Additionally, it’s essential to provide plenty of hiding spots such as rocks, caves, and driftwood to prevent stress and territorial behavior. Overall, Clown Loaches are an excellent choice for those looking for peaceful and colorful tank mates for Oscar fish.
14: Reedfish
| Fish Name | Reedfish |
| Scientific Name | Erpetoichthys calabaricus |
| Origin | Africa |
| Adult Size | 14 inches (35 cm) |
| Diet Type | Carnivore |
| Temperament | Peaceful |
| Needed Water Temperature | 75-82°F (24-28°C) |
| Optimum Tank Size | 55 gallons (208.2 liters) |
| Care Level | Difficult |
Reedfish, also known as Ropefish, are eel-like fish that can be compatible with Oscar fish in a community tank. They have a unique appearance, with long, thin bodies and elongated snouts. Reedfish are nocturnal and will spend most of their time hiding in caves or under driftwood during the day.
Reedfish are carnivorous and will eat small fish and invertebrates, so it’s important to make sure they are well-fed to prevent any aggression towards tank mates. They prefer slightly acidic water with temperatures between 75-82°F (24-28°C) and require plenty of hiding places in the aquarium. Reedfish can grow up to 14 inches (35 cm) in length, so a large tank is necessary to accommodate their size.
15: Black Ghost Knife Fish
| Fish Name | Black Ghost Knife Fish |
| Scientific Name | Apteronotus albifrons |
| Origin | South America |
| Adult Size | 20 inches (50 cm) |
| Diet Type | Carnivore |
| Temperament | Semi-aggressive |
| Needed Water Temperature | 75-82°F (24-28°C) |
| Optimum Tank Size | 125 gallons (473.2 liters) |
| Care Level | Difficult |
Black Ghost Knife Fish are peaceful and calm creatures that spend most of their time hiding in the aquarium’s plants and decorations. They are nocturnal and have poor eyesight, which makes them less likely to compete with Oscar fish for food or territory. Their diet consists mainly of worms, insect larvae, and small fish.
They have a semi-aggressive temperament and are unlikely to bother Oscar unless bothered. However, Black Ghost Knife Fish can grow up to 20 inches long, so a large tank is necessary for them to coexist with Oscar fish.
16: Severums
| Fish Name | Severums |
| Scientific Name | Heros severus |
| Origin | South America |
| Adult Size | 8-10 inches (20-25 cm) |
| Diet Type | Omnivore |
| Temperament | Peaceful |
| Needed Water Temperature | 76-84°F (24-29°C) |
| Optimum Tank Size | 75 gallons (283.9 liters) |
| Care Level | Easy |
Severums are hardy and adaptable fish that make great tank mates for Oscar fish. They are omnivorous and will eat both plants and animals. They have a peaceful temperament and are unlikely to fight with Oscar fish making them one of the best tank mates for Oscars. Severums grow to be about 10 inches long and prefer warm water temperatures of around 76-84 degrees Fahrenheit. They are also relatively easy to care for, making them a good choice for novice fish keepers.
17: Fire Eel
| Fish Name | Fire Eel |
| Scientific Name | Mastacembelus Erythrotaenia |
| Origin | Southeast Asia |
| Adult Size | 20 inches (50 cm) |
| Diet Type | Carnivore |
| Temperament | Peaceful |
| Needed Water Temperature | 75-82°F (24-28°C) |
| Optimum Tank Size | 100 gallons (378.5 liters) |
| Care Level | Difficult |
Fire Eels are unique and fascinating creatures that can coexist with Oscar fish. They have a peaceful temperament and will not bother or be bothered by Oscar fish. Fire Eels are carnivorous and primarily eat live or frozen meaty foods, such as worms, shrimp, and small fish. They grow up to 20 inches long, so a large aquarium is necessary for them to coexist with Oscar fish. They are also sensitive to water quality, so frequent water changes are essential to keep them healthy.
18: Red Parrot
| Fish Name | Red Parrot |
| Scientific Name | N/A (man-made hybrid) |
| Origin | Taiwan |
| Adult Size | 8-10 inches (20-25 cm) |
| Diet Type | Omnivore |
| Temperament | Peaceful |
| Needed Water Temperature | 72-82°F (22-28°C) |
| Optimum Tank Size | 50 gallons (189.3 liters) |
| Care Level | Easy |
Red Parrot fish are hybrid cichlids that are a popular choice for aquariums. They are hardy and adaptable and can coexist with Oscar fish. They have a peaceful temperament and are unlikely to fight with Oscar fish. Their diet consists mainly of pellets or flakes, but they will also eat live or frozen meaty foods, such as worms or shrimp. Red Parrot fish can grow up to 10 inches long and prefer warm water temperatures of around 72-82 degrees Fahrenheit. They are also relatively easy to care for, making them a good choice for novice fish keepers.
19: Giant Gourami
| Fish Name | Giant Gourami |
| Scientific Name | Osphronemus goramy |
| Origin | Southeast Asia |
| Adult Size | 24-28 inches (60-70 cm) |
| Diet Type | Omnivore |
| Temperament | Peaceful |
| Needed Water Temperature | 75-82°F (24-28°C) |
| Optimum Tank Size | 250 gallons (946.4 liters) |
| Care Level | Moderate |
Giant Gouramis are one of the best tank mates for Oscar fish because they are peaceful and calm creatures, so they can coexist with Oscar fish. They are omnivorous and will eat both plants and animals but are unlikely to fight with Oscar fish. Giant Gouramis grow up to 28 inches long, so a large tank is necessary for them to coexist with Oscar fish. These fish prefer warm water temperatures of around 75-82 degrees Fahrenheit and are also relatively easy to care for, making them a good choice for novice fish keepers.
20: Blue Acaras
| Fish Name | Blue Acaras |
| Scientific Name | Aequidens pulcher |
| Origin | South America |
| Adult Size | 8-10 inches (20-25 cm) |
| Diet Type | Omnivore |
| Temperament | Peaceful |
| Needed Water Temperature | 75-82°F (24-28°C) |
| Optimum Tank Size | 75 gallons (283.9 liters) |
| Care Level | Easy |
Blue Acaras are peaceful and calm creatures that can coexist with Oscar fish. They are omnivorous and will eat both plants and animals. They have a peaceful temperament and are unlikely to fight with Oscar fish. Blue Acaras grow to be about 8-10 inches long and prefer warm water temperatures of around 75-82 degrees Fahrenheit. They are also relatively easy to care for, making them a good choice for novice fish keepers.
21: Bichir
| Fish Name | Bichir |
| Scientific Name | Polypterus |
| Origin | Africa |
| Adult Size | 12-20 inches (30-50 cm) |
| Diet Type | Carnivore |
| Temperament | Peaceful |
| Needed Water Temperature | 72-82°F (22-28°C) |
| Optimum Tank Size | 75 gallons (283.9 liters) |
| Care Level | Moderate |
Bichirs, also known as “dinosaur fish,” are unique-looking fish that can make great tank mates for Oscar fish. They are large, carnivorous fish that come in different species, sizes, and colors. Oscar fish compatibility with Bichirs is undoubted because Bichirs are known for their hardiness and adaptability to different water conditions. They are slow swimmers and prefer to rest on the bottom of the tank, which can be a good contrast to the active and energetic Oscar fish.
Bichirs are also compatible with Oscar fish because they have similar dietary requirements, both being carnivorous fish that enjoy a diet of live or frozen foods. They have armored scales that can protect them from the occasional nipping of the Oscars, making them a good match.
22: Silver Arowana
| Fish Name | Silver Arowana |
| Scientific Name | Osteoglossum bicirrhosum |
| Origin | South America |
| Adult Size | 36 inches (91 cm) |
| Diet Type | Carnivore |
| Temperament | Semi-aggressive |
| Needed Water Temperature | 75-86°F (24-30°C) |
| Optimum Tank Size | 250 gallons (946.4 liters) |
| Care Level | Difficult |
The Silver Arowana is a popular and unique fish that can be compatible with Oscar fish in the same tank. Arowanas are known for their distinctive shape, large size, and striking silver color. They are also carnivorous fish that enjoy a similar diet to Oscar fish. Arowanas are good tank mates for Oscars if they are of the same size but will become aggressive and likely to attack other fish especially when they get up to 12 inches long.
Arowanas are also skilled jumpers, so having a tight-fitting lid on the tank is crucial to prevent them from jumping out. Additionally, since they are large fish, it’s recommended to have a large tank to accommodate their size and swimming needs.
23: Firemouths
| Fish Name | Firemouths |
| Scientific Name | Thorichthys meeki |
| Origin | Central America |
| Adult Size | 6-7 inches (15-18 cm) |
| Diet Type | Omnivore |
| Temperament | Semi-aggressive |
| Needed Water Temperature | 75-82°F (24-28°C) |
| Optimum Tank Size | 50 gallons (189.3 liters) |
| Care Level | Easy |
Firemouth cichlids are colorful, peaceful fish that can be excellent tank mates for Oscar fish. They are small compared to Oscars and typically grow up to 6-7 inches in length. Firemouths are known for their distinctive red coloration around their mouths, which can add a beautiful contrast to the tank. They are also relatively peaceful and can coexist with Oscars without any major issues.
However, it’s important to note that like Oscars, Firemouths can be territorial and may become aggressive during their breeding season, so it’s recommended to have enough hiding places and territories for both fish to avoid conflicts.
24: Pictus Catfish
| Fish Name | Pictus Catfish |
| Scientific Name | Pimelodus pictus |
| Origin | South America |
| Adult Size | 5-7 inches (13-18 cm) |
| Diet Type | Omnivore |
| Temperament | Peaceful |
| Needed Water Temperature | 72-79°F (22-26°C) |
| Optimum Tank Size | 50 gallons (189.3 liters) |
| Care Level | Easy |
Pictus catfish are bottom-dwelling fish that can be compatible with Oscar fish in the same tank. They are known for their unique and attractive spotted patterns, making them a popular choice for aquarium enthusiasts. Pictus catfish are peaceful and can coexist with Oscar fish without any major issues.
They are also active swimmers and can add movement and activity to the tank. However, it’s important to note that they are sensitive to poor water conditions, so regular water changes and maintenance are crucial for their well-being.
25: Loricariidae
| Fish Name | Loricariidae |
| Scientific Name | Various |
| Origin | South America |
| Adult Size | Varies |
| Diet Type | Herbivore |
| Temperament | Peaceful |
| Needed Water Temperature | 72-82°F (22-28°C) |
| Optimum Tank Size | Varies |
| Care Level | Easy to moderate |
Another best cleaner fish for Oscar tank is the Loricariidae, also known as plecos, which are popular bottom-dwelling fish that is compatible with Oscar fish in the same tank. They are known for their ability to clean algae and other debris from the tank, making them a useful addition to the tank. Loricariidae is relatively peaceful and can coexist with Oscar fish without any major issues.
They are also hardy and can tolerate a wide range of water conditions. However, it’s important to note that they can grow quite large and may outgrow the tank, so it’s important to choose a suitable species for the tank size.
26: Tinfoil Barb
| Fish Name | Tinfoil Barb |
| Scientific Name | Barbonymus schwanenfeldii |
| Origin | Southeast Asia |
| Adult Size | 14 inches (35 cm) |
| Diet Type | Omnivore |
| Temperament | Semi-aggressive |
| Needed Water Temperature | 72-82°F (22-28°C) |
| Optimum Tank Size | 100 gallons (378.5 liters) |
| Care Level | Easy |
Tinfoil barbs are peaceful and active fish that can grow up to 14 inches in length, making them good tank mates for Oscar fish. They are known for their shimmering scales and their ability to swim fast, which can add a nice visual contrast to the slow-moving Oscar fish. Tinfoil barbs are also social fish and do best in groups of at least 5 or more, which can help to reduce aggression among tank mates. They are also hardy and adaptable, which makes them a good choice for beginners.
27: Black Spotted Eel
| Fish Name | Black Spotted Eel |
| Scientific Name | Mastacembelus dayi |
| Origin | Southeast Asia |
| Adult Size | 14 inches (35 cm) |
| Diet Type | Carnivore |
| Temperament | Peaceful |
| Needed Water Temperature | 73-82°F (23-28°C) |
| Optimum Tank Size | 50 gallons (189.3 liters) |
| Care Level | Moderate |
Black spotted eels are a good choice for Oscar fish tanks as they are peaceful and nocturnal, which means they are active at night and will not compete for food with the Oscar fish during the day. They can grow up to 14 inches in length and require hiding spots and plants to feel secure in their environment.
Black spotted eels are also known for their unique appearance, with long slender bodies and black spots along their back. They are hardy fish that can adapt to a range of water conditions, making them suitable for beginner fish keepers. However, it is important to note that they have a tendency to escape from tanks, so a secure lid is necessary to prevent them from jumping out.
28: Rainbow Cichlids
| Fish Name | Rainbow Cichlids |
| Scientific Name | Herotilapia multispinosa |
| Origin | Central America |
| Adult Size | 3-4 inches (7-10 cm) |
| Diet Type | Omnivore |
| Temperament | Peaceful |
| Needed Water Temperature | 75-82°F (24-28°C) |
| Optimum Tank Size | 30 gallons (113.6 liters) |
| Care Level | Easy |
Rainbow Cichlids are a small and colorful species that are native to Central America. They are known for their vibrant colors, which include shades of blue, green, and red. Rainbow Cichlids are generally peaceful and can be kept with other non-aggressive fish. They are omnivorous and will eat both plant matter and meaty foods.
Rainbow Cichlids are compatible with Oscar fish due to their peaceful nature and ability to coexist with other fish in a community setting. However, it’s important to provide them with plenty of hiding spots in the aquarium, as they can become territorial during breeding season.
Frequently Asked Questions (FAQs)
Can Oscars live with other fish?
Yes, Oscars can live with other fish, but not all fish are compatible with Oscars. It’s important to choose compatible tank mates based on size, temperament, and water requirements.
Can Koi and Oscars live together?
No, koi and Oscars cannot live together. Koi are cold-water fish that require different water parameters than Oscars, which are tropical fish. Mixing them can lead to health issues for both species.
Can Oscar fish live with goldfish?
No, Oscar fish and goldfish should not live together. Goldfish are cold-water fish that require different water parameters than Oscars, which are tropical fish. Mixing them can lead to health issues for both species.
Can Oscars live with cichlids?
Yes, Oscars can live with some cichlid species, but not all. It’s important to choose cichlid species that are similar in size and temperament to the Oscars.
Can Oscars live with rainbow fish?
It is not recommended to keep Oscars with Rainbow Fish as they have different water temperatures and habitat requirements.
Can Oscars and Angelfish live together?
It is not recommended to keep Oscars and Angelfish together as they have different water temperatures and habitat requirements, and Oscars may view Angelfish as potential prey.
Can Flowerhorn live together with Oscars?
No, Flowerhorn and Oscars should not live together as they have different water requirements and aside from that, they can become aggressive towards each other.
Can Peacock Cichlids live with Oscars?
Yes, peacock cichlids can live with Oscars if they are of similar size and temperament. However, it is important to monitor their behavior and watch for signs of aggression.
Can Oscars live with parrot fish?
Yes, Oscars can live with parrot fish, but it is important to select parrot fish that are similar in size and temperament to avoid any territorial conflicts.
Can Oscar and Arowana live together?
No, Oscars and Arowanas should not live together as they have different water requirements, and Arowanas can easily outcompete and injure Oscars due to their large size.
Can Oscars live with African cichlids?
No, Oscars should not live with African cichlids as they have different water temperatures and habitat requirements and may exhibit aggressive behavior towards each other.
What is the minimum tank size required for keeping Oscars with other fish?
Oscars are large fish that require plenty of swimming space. A minimum of 75 gallons is recommended for one Oscar and an additional 50 gallons for every additional Oscar or tank mate.
Can small fish live with Oscars?
Small fish are not recommended as tank mates for Oscars as they may be viewed as prey and become food for the larger fish. It’s best to choose larger fish species that can hold their own and won’t be intimidated by the Oscars.
What water parameters should be maintained in a community tank with Oscars?
The optimal water parameters for a community tank with Oscars are a pH of 6.5-7.5, a temperature of 75-81°F, and moderate water flow. Ammonia and nitrite levels should be kept at 0 ppm, and nitrate levels should be below 40 ppm.
I’m Akin Bouchard. Even though I now own several different fish species, I first became a koi pond owner because I loved these creatures and wanted to turn my passion into something more serious. I take pride in my collection of koi fish and love sharing my knowledge with others interested in these beautiful creatures.