Oscar Care Guide
Astronotus ocellatus
Stocking Calculator
Bioload Score
16000
AggressiveModerateFreshwater
- Max Size
- 35.0 cm / 14.0"
- Temperature
- 24–28°C (75–82°F)
- pH Range
- 6.0 – 7.5
- Min Tank Size
- 190L (50 gal)
- Min Group Size
- Can be kept alone
- Tank Level
- Bottom
- Origin
- South America
- Temperament
- Aggressive
- Difficulty
- Moderate
- Breeding Difficulty
- Difficult
Diet
Carnivorous, they primarily eat live or frozen meaty foods such as small fish, shrimp, and worms
Community Compatibility
Oscars are best kept alone or with large, robust fish that can handle their aggressive behavior. Tankmates should be chosen carefully to avoid fin nipping or aggression.
Good to Know
Oscars are highly territorial and aggressive fish, so they require a spacious tank with appropriate hiding places and territories.
Gender Differences
Males may have more pointed dorsal and anal fins, and females may be slightly larger and rounder
Stock Oscar in Your Tank
Use our free stocking calculator to see if Oscar fits your aquarium