What fish can live with Cuckoo / petricola catfish?

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 Cuckoo / petricola catfish against your own reading before you buy.

What tank mates should you avoid with Cuckoo / petricola catfish?

Avoid Chili Rasbora, Guppy, Ember Tetra based on size, temperament, or predation risk on file.

What size tank do Cuckoo / petricola catfish need for a community?

200L is the planning floor for adult swimming space and bioload headroom. Long-term, a 244L+ 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.

Cuckoo / petricola catfish tank mates

An African catfish that mimics the synodontis pattern and fits large rift lake setups. A schooling species that needs its own kind and hard water.

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 Cuckoo / petricola catfish profile·Compatibility checker·Tank builder·More catfish

Best tank mates (on file)

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

African Cichlid Pair check
The Cuckoo / petricola catfish profile lists African Cichlid as both safe and a recommended pairing. African Cichlid schools in groups of 6 or more, so plan room for the whole group rather than one fish.
Boesemani Rainbowfish Pair check
The Cuckoo / petricola catfish profile lists Boesemani Rainbowfish as both safe and a recommended pairing. Boesemani Rainbowfish schools in groups of 6 or more, so plan room for the whole group rather than one fish.
Corydoras Catfish Pair check
The Cuckoo / petricola catfish 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.
Molly Pair check
The Cuckoo / petricola catfish profile lists Molly as both safe and a recommended pairing. Molly is a peaceful beginner-care species with a 80L minimum. Run the pair checker for your specific tank before stocking.
Sailfin Molly Pair check
The Cuckoo / petricola catfish profile lists Sailfin Molly as a recommended pairing. Sailfin Molly is a peaceful beginner-care species with a 120L minimum. Run the pair checker for your specific tank before stocking.

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.

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.
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.
Pea Puffer Open pair check
Pea Puffer is flagged as a fin-nipper and Cuckoo / petricola catfish carries the long-finned risk profile (veil tails, trailing fins). Expect torn fins within days unless the nipper is in a proper group and the long-finned fish has plenty of cover. Pea Puffer is flagged predatory. Equal-size adults usually coexist, but the moment one is stressed, sick, or smaller after a moult, it becomes prey. Both species defend territory. The pairing needs a long footprint and rockwork or planting that breaks the sightline between two defended spots. Pea Puffer is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Cuckoo / petricola catfish. Run the pair checker before stocking.

Fish to avoid with Cuckoo / petricola catfish

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

Chili Rasbora See why (pair)
Cuckoo / petricola catfish is flagged as predatory or as likely to eat small fish, and Chili Rasbora at 2cm is well within an adult Cuckoo / petricola catfish's gape.
Guppy See why (pair)
Cuckoo / petricola catfish is flagged as predatory or as likely to eat small fish, and Guppy at 5cm is well within an adult Cuckoo / petricola catfish's gape.
Ember Tetra See why (pair)
Cuckoo / petricola catfish is flagged as predatory or as likely to eat small fish, and Ember Tetra at 2cm is well within an adult Cuckoo / petricola catfish's gape.

Tank size and groups

Published minimum for Cuckoo / petricola catfish: 200L — group minimum 4 (schooling).
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: 200L 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 200L minimum tank for Cuckoo / petricola catfish needs a filter rated for at least 800L/hr turnover and a heater maintaining 24–28°C.

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