Common name: Swimming Crabs

The Portunidae family, commonly known as Swimming Crabs, includes species like the Blue Crab (Callinectes sapidus). These crabs are characterized by their flattened hind legs adapted for swimming. They are often active and can add both movement and interest to a reef or fish-only aquarium. However, they may prey on small fish and invertebrates, so tankmates should be chosen with care. Swimming Crabs require ample hiding places and a varied diet, including meaty foods and detritus.