Crabs and dwarf crayfish

Small crabs and dwarf crayfish are unusual pets with lots of personality. We cover only species that stay small and can live in a home setup, because large crayfish destroy plants, catch fish and, in many places, are invasive and restricted.

• Mexican dwarf orange crayfish (Cambarellus patzcuarensis): grows to about 1.5 inches (4 cm) and is much calmer than larger crayfish. It can live in a planted tank of 15 gallons (60 L) or more with plenty of hiding places, although it may catch slow fish and shrimp.
• Vampire crab (Geosesarma): a semi-terrestrial crab that needs a paludarium with land area, high humidity and a small water section, not a fully filled aquarium.

Both are escape artists: use a tight lid and cover any gaps around cables and pipes. During molting they are vulnerable; leave the old shell in the tank, since they eat it to recover minerals, and provide caves where they can hide.

Keep water clean and stable, avoid copper and give a varied diet of sinking pellets, vegetables and occasional protein. Before buying, check your state and local regulations: possession or transport of some crayfish is restricted. Never release crabs or crayfish outdoors.

Crabs and dwarf crayfish