Red-tailed catfish tank mates
This hub’s recommended-mates list is empty on purpose. A redtail catfish swallows fish approaching half its length and ends life well past a metre — shop “monster community” tanks with oscars, tinfoil barbs, or common plecos are temporary photos, not a home plan. Those names sit in avoid because each becomes a meal or a rival in water you will not own. The honest ownership paths are a true species system of several thousand litres, or a different fish. Pair checks here exist to document risk, not to green-light a community.
Common mistakeBuying a juvenile redtail for a 200L ‘large’ tank expecting it to stay manageable is how keepers invent an un-rehomeable monster. Adults need thousands of litres. Shop cuteness is not a stocking licence — plan the adult or do not buy the juvenile.
Each name below opens a pair check with Red-tailed catfish. That check is the decision, not the list itself.
Usually safer companions
Conservative shortlist from this profile. Open a pair page before you buy.
None listed here. Use the pair checker with species you are considering.
Risky or situational
May work with more water, a mature system, or a species-only setup. Read the pair page before you experiment.
Nothing extra listed beyond the safer list.
Fish to avoid with Red-tailed catfish
Predation, aggression, or space rules on this profile. Treat these as poor default mixes.
Red-tailed catfish is flagged as predatory or as likely to eat small fish, and Boesemani Rainbowfish at 11cm is well within an adult Red-tailed catfish's gape.
Red-tailed catfish is flagged as predatory or as likely to eat small fish, and Chili Rasbora at 2cm is well within an adult Red-tailed catfish's gape.
Red-tailed catfish is flagged as predatory or as likely to eat small fish, and Corydoras Catfish at 6cm is well within an adult Red-tailed catfish's gape.
Red-tailed catfish is flagged as predatory or as likely to eat small fish, and Dwarf Gourami at 8cm is well within an adult Red-tailed catfish's gape.
Red-tailed catfish is flagged as predatory or as likely to eat small fish, and Ember Tetra at 2cm is well within an adult Red-tailed catfish's gape.
Red-tailed catfish is flagged as predatory or as likely to eat small fish, and Guppy at 5cm is well within an adult Red-tailed catfish's gape.
Red-tailed catfish is flagged as predatory or as likely to eat small fish, and Neon Tetra at 4cm is well within an adult Red-tailed catfish's gape.
Tank size and groups
- Published minimum for Red-tailed catfish: 2000L. 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: 300L hub.
Easier alternatives to consider
Hardier first-tank names from the library. Still read the profile. Not a substitute for reading this one.
Plan before you buy
Start a pair check with Red-tailed catfish, or open a starter plan with the top safer companions in the builder.
Tank hubs: 300L
Related reading
Guides that list other fish with the same trait, so you can plan around the group rather than one row.
- Fish that eat smaller tank mates →
Red-tailed catfish may eat anything that fits in its mouth as it grows.
Filtration & heating
A 2000L minimum tank for Red-tailed catfish needs a filter rated for at least 8000L/hr turnover and a heater maintaining 24–28°C.
Similar fish (same category)
- Pictus catfish · min 250L
- Cuckoo / petricola catfish · min 200L
- Twig / whiptail catfish · min 150L
- Emerald catfish (Brochis) · min 120L
- Bronze corydoras · min 100L
- Sterba's Corydoras · min 100L
- Upside-down Catfish · min 100L
- Adolfoi cory · min 80L
Related (care + temperament)
Red-tailed catfish tank mates — quick answers
- What fish can live with Red-tailed catfish?
- This hub’s recommended-mates list is empty on purpose.
- What tank mates should you avoid with Red-tailed catfish?
- Avoid Boesemani Rainbowfish, Chili Rasbora, Corydoras Catfish, Dwarf Gourami, Ember Tetra, Guppy based on size, temperament, or predation risk on this profile.
- What size tank do Red-tailed catfish need for a community?
- 2000L is the planning floor for adult swimming space and bioload. A 3000L+ tank is the more comfortable long-term footprint. Length and depth matter as much as raw litres for active or territorial fish.