Fin nipper: avoid long-finned tank mates such as bettas, fancy guppies and angelfish.
Check a tank with Penguin tetra
Good tank mates for Penguin tetra
These species share its temperature range and temperament, with no fin-nipping or predation risk under our rules. Still check your tank size and bioload in the checker.
African dwarf frog · Amano shrimp · Assassin snail · Banjo catfish · Black neon tetra · Black phantom tetra · Black ruby barb · Bleeding heart tetra · Bloodfin tetra · Bristlenose pleco · Bronze corydoras · Bumblebee goby · Cardinal tetra · Celestial pearl danio · Checkerboard barb · Cherry barb · Cherry shrimp · Chili rasbora · Clown killifish · Clown pleco · Colombian tetra · CPO dwarf crayfish · Crystal red shrimp · Diamond tetra
Avoid with Penguin tetra
African butterflyfish (predation) · Banded archerfish (predation) · Black ghost knifefish (predation) · Blue acara (predation) · Common / comet goldfish (temperature) · Convict cichlid (predation) · Demasoni cichlid (aggression) · Discus (temperature) · Fancy goldfish (temperature) · Jack Dempsey (predation) · Jewel cichlid (predation) · Medaka (temperature) · Oscar (predation) · Paradise fish (temperature) · Pea puffer (aggression) · Pictus catfish (predation) · Rosy barb (temperature) · Senegal bichir (predation)
Sources
Checked 2026-11-09 · confidence: medium. These are cautious community guidelines, not guarantees. Not veterinary advice. Report an error.