Pea Puffer tank mates
Carinotetraodon travancoricus
5 rated pairings from the Pea Puffer care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Pea Puffer needs at least 10 gallons on its own; every companion adds to that.
Excellent matches
1 · Same water, complementary zones, no conflict.
Good matches
1 · Compatible with normal care — watch space and numbers.
Use caution
3 · Works in the right setup; read the note before combining.
Otocinclus
Otocinclus vittatus
10 gal min · 1.5" adult · Peaceful
Fast-moving algae eaters that may avoid puffer aggression, but puffers may still nip at them
Emerald Dwarf Rasbora
Danio erythromicron
10 gal min · 1" adult · Peaceful
Small, quick fish that can evade puffer attacks, but constant stress may occur
Celestial Pearl Danio
Danio margaritatus
10 gal min · 1" adult · Peaceful
Fast and small enough to potentially coexist, but fin-nipping risk remains high
Also recommended alongside Pea Puffer
Species whose own guides list Pea Puffer as a tank mate.
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.