The hardy Emerald Mithrax Crab, also known as Emerald Crab or Emerald Mythrax Crab, has a shiny green, flat, compact body and hairy legs.

It requires a large aquarium with plenty of rock work and many hiding places. The Emerald Mithrax Crab eats algae and various types of meaty items it can scavenge. It can be harmful to small fish, but unlike many other animals, it will eat bubble algae, and is useful for cleaning tanks of this potential problem.

If there is insufficient algae, the diet should be supplemented with both herbivorous and meaty foods.

It can reach a maximum size of 2 1/2" in aquarium.