Fiddler Crab tank mates
Uca pugnax
3 rated pairings from the Fiddler Crab care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Fiddler Crab needs at least 20 gallons on its own; every companion adds to that.
Good matches
2 · Compatible with normal care — watch space and numbers.
Blue Mystery Snail
Pomacea bridgesii
5 gal min · 2" adult · Peaceful
Peaceful snail that occupies different ecological niche; avoid if crabs are very aggressive
Mystery Snail
Pomacea bridgesii
5 gal min · 2" adult · Peaceful
Large enough to avoid predation; provides algae control without competing for space
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.