Mexican Dwarf Crayfish tank mates
Cambarellus patzcuarensis
6 rated pairings from the Mexican Dwarf Crayfish care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Mexican Dwarf 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 with identical water requirements and non-aggressive behavior
Emerald Dwarf Rasbora
Danio erythromicron
10 gal min · 1" adult · Peaceful
Small, peaceful fish that occupy mid-water zones and won't compete with bottom-dwelling crayfish
Anubias Nana
Anubias barteri var. nana
Hardy plant that provides shelter and won't be uprooted by crayfish burrowing
Good matches
3 · Compatible with normal care — watch space and numbers.
Red Cherry Shrimp
Neocaridina davidi
5 gal min · 1.2" adult · Peaceful
Similar water parameters; crayfish may occasionally hunt shrimplets but adults coexist peacefully
Guppy
Poecilia reticulata
10 gal min · 2" adult · Peaceful
Small, peaceful fish; crayfish are unlikely to prey on adults but may hunt fry
Ramshorn Snail
Planorbarius corneus
5 gal min · 0.75" adult · Peaceful
Peaceful detritivores that share similar ecological roles without direct conflict
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.