Though the natural range of blue crab (Lat. Callinectes sapidus) is the western Atlantic Ocean from Nova Scotia to Argentina, it has also been successfully introduced, accidentally or deliberately, into both Asia and Europe. It is an active swimmer, with its last pair of walking legs adapted to a paddle-like shape to accommodate swimming. Blue crabs may grow to a carapace width of 23 cm (9 in). The blue crab is a bottom-dweller found in a variety of habitats. Unlike other fisheries affected by climate change, blue crab is expected to do well; warming causes better breeding conditions, more survivable winters, and a greater range of habitable areas in the Atlantic coast. It is an omnivore, eeating both plants and animals. It typically consumes thin-shelled bivalves, annelids, small fish, plants, and nearly any other item it can find.  It is an invasive voracious alien species that has spread throughout the Mediterranean.