Oscar

Astronotus ocellatus

Also known as: Tiger Oscar

A big, intelligent 'wet pet' that recognizes its owner — and needs a very large tank.

Water

Freshwater

Temperature

74–81°F

pH

6–7.5

Hardness

5–20 dGH

Max size

12 in

Min tank

75 gal

Temperament

Aggressive

Social

Solitary

Swim level

All

Diet

Carnivore

Care level

Intermediate

Lifespan

10-15 years

Breeding

Egg-depositor

Suitability

Intermediate

Origin

Amazon basin

Oscars are charismatic and interactive but reach a foot long, eat heavily, and pollute quickly, so they demand a large tank and strong filtration. They'll eat any tankmate they can fit in their mouth.