What fish can live with Cockatoo / crested Apistogramma?

Use the "Often compatible" lists as a shortlist, not a stocking plan. Always run the pair tool and check the footprint of your actual tank first. Verify behaviour for Cockatoo / crested Apistogramma against your own reading before you buy.

What tank mates should you avoid with Cockatoo / crested Apistogramma?

Avoid Betta, African Cichlid, Oscar based on size, temperament, or predation risk on file.

What size tank do Cockatoo / crested Apistogramma need for a community?

100L is the planning floor for adult swimming space and bioload headroom. Long-term, a 122L+ tank lets adults use the full footprint without crowding the next species. Footprint, meaning length and front-to-back depth, matters as much as raw volume for active or territorial species.

Cockatoo / crested Apistogramma tank mates

A small apistogramma with dramatic dorsal fin extensions on males. Needs soft warm water and a harem setup: one male and two or more females.

Evidence: partially verified

Confidence: high

Lists below are built from this species record (safest, best with, risky, unsafe) — each link opens a pair-level check, not a guarantee.

← Full Cockatoo / crested Apistogramma profile·Compatibility checker·Tank builder·More cichlid

Best tank mates (on file)

Merged from conservative safest and best with fields — de-duplicated by species.

Chili Rasbora Pair check
The Cockatoo / crested Apistogramma profile lists Chili Rasbora as a safe tank mate. Chili Rasbora schools in groups of 8 or more, so plan room for the whole group rather than one fish. Chili Rasbora grows to about 2cm, which is borderline mouth-size for an adult 7cm Cockatoo / crested Apistogramma.
Corydoras Catfish Pair check
The Cockatoo / crested Apistogramma profile lists Corydoras Catfish as both safe and a recommended pairing. Corydoras Catfish schools in groups of 6 or more, so plan room for the whole group rather than one fish.
Dwarf Gourami Pair check
The Cockatoo / crested Apistogramma profile lists Dwarf Gourami as a recommended pairing. Dwarf Gourami is a peaceful beginner-care species with a 60L minimum. Run the pair checker for your specific tank before stocking.
Ember Tetra Pair check
The Cockatoo / crested Apistogramma profile lists Ember Tetra as both safe and a recommended pairing. Ember Tetra schools in groups of 8 or more, so plan room for the whole group rather than one fish. Ember Tetra grows to about 2cm, which is borderline mouth-size for an adult 7cm Cockatoo / crested Apistogramma.
Panda Corydoras Pair check
The Cockatoo / crested Apistogramma profile lists Panda Corydoras as both safe and a recommended pairing. Panda Corydoras schools in groups of 6 or more, so plan room for the whole group rather than one fish.

Risky or situational

From risky tank mates and broad avoid with (excluding “unsafe” below). May work with species-only setups, more water, or mature systems — read the pair page.

German Blue Ram Open pair check
Both species defend territory. The pairing needs a long footprint and rockwork or planting that breaks the sightline between two defended spots. Run the pair checker before stocking.
Neon Tetra Open pair check
Marked risky or situational on the profile. Tank length and group size change the outcome more than a temperament label does.
Guppy Open pair check
Marked risky or situational on the profile. Tank length and group size change the outcome more than a temperament label does.
Angelfish Open pair check
Angelfish reaches 20cm and is flagged predatory or as likely to eat small fish. Adult-size Cockatoo / crested Apistogramma at 7cm is inside that gape range. Both species defend territory. The pairing needs a long footprint and rockwork or planting that breaks the sightline between two defended spots. Angelfish is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Cockatoo / crested Apistogramma. Run the pair checker before stocking.

Fish to avoid with Cockatoo / crested Apistogramma

From the unsafe list — predation, aggression, or space rules on this profile.

Betta See why (pair)
Betta conflicts with Cockatoo / crested Apistogramma on temperament, predation, or footprint. The juvenile size in a shop tank is not the figure that matters here.
African Cichlid See why (pair)
African Cichlid reaches 15cm and is flagged predatory. Cockatoo / crested Apistogramma at 7cm is prey-sized for it.
Oscar See why (pair)
Oscar reaches 35cm and is flagged predatory. Cockatoo / crested Apistogramma at 7cm is prey-sized for it. Oscar needs at least 300L, far above the 100L minimum for Cockatoo / crested Apistogramma. The tank that houses one stresses the other.

Tank size and groups

Published minimum for Cockatoo / crested Apistogramma: 100L — group minimum 1 .
Compatibility changes when the tank is too short for turning, too little for a real school, or too warm for one species and not the other — that is why pair checks include tank context, not only temperament.
Nearest litre hub to this minimum: 100L hub.

Easier alternatives to consider

Conservative beginner-peaceful picks from the library — not replacements for reading, but a shorter on-ramp than this species for a first tank.

Plan before you buy

Pair checks for every mix, then multi-species stocking in the builder.

Open compatibility checker Tank builder

Filtration & heating

A 100L minimum tank for Cockatoo / crested Apistogramma needs a filter rated for at least 400L/hr turnover and a heater maintaining 24–30°C.

Filter buying guide →Heater buying guide →Beginner plants guide →