The spider crab has a rounded convex reddish or yellowish brown carapace with numerous small spines.
It is often covered with algae and anemones, enabling it to blend with the surroundings.
It is found in the northeast Atlantic, in the Archipelago
of the Azores and the Mediterranean Sea, dwelling in sandy and rocky bottoms, in waters 10 to 150 meters deep.
It feeds on what it can find
at the bottom, including algae and small bivalves.
It reproduces from May to July. Female spider crabs mate after moulting, becoming more vulnerable to predators, which is why males of the species form a protective barrier around them.