Rainbow Crab tank mates
Cardisoma armatum
6 rated pairings from the Rainbow Crab care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Rainbow Crab needs at least 40 gallons on its own; every companion adds to that.
Good matches
4 · Compatible with normal care — watch space and numbers.Anubias Snow White
Anubias barteri var. nana
Hardy plant that can withstand crab disturbance; provides shelter
Java Moss
Taxiphyllum barbieri
Tough plant offering hiding spaces and biofilm growth
Bucephalandra
Bucephalandra sp.
Durable plant resistant to crab damage; low-light tolerant
Marimo Moss Ball
Aegagropila linnaei
Provides enrichment and cannot be easily destroyed
Use caution
2 · 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.