Tags: Crustacean.
Dyspanopeus sayi is a species of mud crab that is native to the Atlantic coast of North America. It has also become established outside its native range living in Swansea Docks since 1960 the Mediterranean Sea since the 1970s the North Sea since 2007 and the Black Sea since 2010. It can reach a carapace width of 20 mm (0.8 in) and has black tips to its unequal claws. It feeds on bivalves and barnacles and is in turn eaten by predators including the Atlantic blue crab Callinectes sapidus.
