Oscar Cichlid compatibility guide. 6 compatible tankmates + 5 species to avoid + temperament + size + water-chemistry guidance.
Fast schooling fish, too big for adult oscars to eat. Schools of 6+.
Tough enough to handle oscars. Similar habits.
Larger peaceful cichlid, comparable size to oscars.
Big armored algae eater. Larger plecos are oscar-proof.
Aggressive enough to coexist; needs equally large tank.
Aggressive cichlid, similar water + size requirements.
Adult oscars eat anything that fits in their mouth. They have big mouths.
Become oscar food.
Eaten immediately.
Eaten when they leave hiding.
Pairs work, but unpaired oscars kill each other. Better singles or established bonded pairs.
Use the stocking calculator to verify your specific plan. Browse stocking ideas by tank size for proven setups, or read the Oscar Cichlid care guide for full husbandry details.
Browse all tankmate guides.