CPO Crayfish tank mates
Cambarellus patzcuarensis
6 rated pairings from the CPO Crayfish care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. CPO Crayfish needs at least 10 gallons on its own; every companion adds to that.
Excellent matches
3 · Same water, complementary zones, no conflict.
Otocinclus
Otocinclus vittatus
10 gal min · 1.5" adult · Peaceful
Peaceful algae eaters that occupy different ecological niches and ignore crayfish
Ramshorn Snail
Planorbarius corneus
5 gal min · 0.75" adult · Peaceful
Peaceful snails that occupy different feeding niches and provide algae control
Anubias Barteri
Anubias barteri
Hardy plant that crayfish won't uproot; provides shelter and grazing opportunities
Good matches
2 · Compatible with normal care — watch space and numbers.
Emerald Dwarf Rasbora
Danio erythromicron
10 gal min · 1" adult · Peaceful
Small, peaceful fish that stay in mid-water and avoid crayfish territory
Amano Shrimp
Caridina multidentata
10 gal min · 2" adult · Peaceful
Larger shrimp that can coexist with CPO; may compete for food but generally compatible
Use caution
1 · Works in the right setup; read the note before combining.
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.