Circular Crab

Atelecyclus rotundatus

The Circular Crab, known scientifically as Atelecyclus rotundatus, is a medium-sized crustacean with a carapace that measures approximately 40 millimeters across. Its carapace is almost circular and has a reddish-brown hue. Divers might notice the 9–11 sharp teeth on the front of its carapace and the three teeth located between its eyes. This crab can often be mistaken for its relative, Atelecyclus undecimdentatus, but can be distinguished by its narrower carapace and finer granulations. This species inhabits the west coast of Europe and Africa, the Mediterranean Sea, and the Cape Verde and Canary Islands. It prefers coarse soft bottoms at shallow depths, ranging from the surface down to 300 meters, although most are found shallower than 120 meters. The Circular Crab is benthic, meaning it lives on the ocean floor, and is commonly found in temperate waters such as the North Sea.