A few good examples include: Arowanas, Bichirs, Convict Cichlids, Firemouth Cichlids, Green Terrors, Jack Dempseys, Jaguar Cichlids, Sailfin Plecos, Severum Cichlids and Silver Dollars. As you can see, fellow cichlids are the most common tank mates since they can usually hold their own against an Oscar.Also know, can Oscars live together?
They could live together, but the weaker one is gonna be miserable. The more oscars the more peaceful it is. And a 90 gal. is fine for two, most of the time, because each oscar has its own personality.
One may also ask, can Flowerhorns live with Oscars? Yes, Flowerhorn fish can live with Oscar fish but there are some suggestions and advice to get the Flowerhorn fish with Oscar fish in the same tank. Flowerhorn fish can live with Oscars if it is not a toddler. Once the Oscar has settled in any new tank completely you can think of shifting the Flowerhorn in the same.
Moreover, do Oscars need tank mates?
While it can be tempting to give your Oscar a few tank mates, it is important to know that this isn't necessary at all. A full aquarium can be more entertaining to watch, but Oscars are perfectly fine on their own.
Are Oscars aggressive to other fish?
Oscar fish are known to be aggressive. Although an Oscar fish can be aggressive, he will share his tank with other fish. In particular he is suited to fish around his own size who are neither too passive nor too aggressive. Like many species, however, every Oscar is different; some are more aggressive than others.
Will 2 Oscars fight?
Oscars fight, it's what they do. Not all of them fight, but a good portion of oscars are just naturally quarrelsome. In nature oscars are territorial. But, like I say, not all oscars fight—some are nice as pie and will even swim together in non-pair groups.Can you put 2 Oscars in the same tank?
No it won't work not because you might accidently get a 2 male Oscars. But because the recommended tank size per Oscar is 50 bare minimum and 55G per Oscar is recommended. Bio load for 2 Oscars would be too much for a 75G.Do Oscars play dead?
Oscar disappoves that change and is sulking, playing dead, trying to break the glass or the tank to protest against the owner… Awwwwwww….. after a water change, the Oscar will sulk, yes, water change, so please don't do water changing so frequently.Can you put Oscars with goldfish?
I put them together in a community tank and the oscar and goldfish are always found together. The oscar is now only slightly bigger and protects the goldfish from other fish.Can Oscar fish live without air pump?
Keep the lid on because these fish are powerful and may jump, or force other fish to jump. While they like strong currents in the wild, the filter outlet should create a strong enough current, so you shouldn't need a water/air pump.What size tank do I need for 2 Oscars?
A 40 gallon breeder will be ideal for one but that would be the bare minimum because of the dimensions but the water volume takes a hit. A 75 gallon would be good for two oscars.Do Oscars bite?
Oscar fish can bite. In fact, most fish have a propensity to bite. But that does not mean all fish can deliver severe bite injuries. Oscar fish is one of those fishes whose bites you should not fear too much.How long can Oscars live?
10 – 20 years
Should Oscars be kept in pairs?
Oscars need good water quality as do most aquarium fish species. It is highly recommended to keep Oscars in a species only aquarium. They do well kept in pairs or groups of 4-5+ without too much trouble. Always try to avoid housing 3 Oscars as two may become a pair, outcasting the third.Why do Oscar fish jump out of the tank?
My Oscar jumped out of the tank. There are many reasons why Oscar fish might jump from a fish tank. One simple reason is that he spotted something that looked like food to him. In the wild, Oscars live in slow-moving rivers or streams of fresh water, and they are carnivores so they frequently feed on insects.How many Oscars can you have in a tank?
In perfect cases, best size should be 75-gallon for one adult Oscar fish. Capacity increases with increase in number of Oscar fish to be kept. For more than one Oscar fish, at least 100 gallon capacity water tank is needed.Do Oscar fish need light?
Oscar fish don't need any specialist lighting. Simply keeping them in a standard room lit by daylight will work just fine. But, if you fancy the idea of adding some lights to your aquarium, doing so won't harm your fish.Do Oscars like to be alone?
Oscar fish can live alone, or with a buddy. They are not schooling fish so it is up to you if you will combine them with a partner or not. Oscar fish can be compatible with other South American Cichlids but some rules of thumb must be followed.How long can Oscars go without food?
Three days is nothing for an oscar. You can easily go a week without feeding.Do Oscars grow to the size of the tank?
In short, no. Most fish, oscars included, have a set range of size they'll grow to, rather like humans in an optimal environment. So for instance if you have a 20 gallon tank and try to throw an oscar in there it will quickly outgrow that environment.How many Oscars can you have in a 180 gallon tank?
3 oscars
How many Oscars can you put in a 75 gallon tank?
Because Oscars typically grow about 10 inches long in captivity, the minimum tank size recommended for a single Oscar is about 55 gallons. Ideally, however, a 75-gallon tank is best for one adult Oscar and, if you plan to keep more than one, you will need a tank at least 100 gallons in capacity. 
