Michele Westmorland / Batwing coral crab (Carpilius corallinus) on coral reef, St Vincent and the Grenadines, Caribbean, May

Luciano Candisani / Batwing Coral Crab (Carpilius corallinus) face, Rocas Atoll, Brazil

Jeff Rotman / Convex Rock crab {Carpilius convexus} on Alcyonarian coral at night, Red Sea.

Francis Abbott / Crab, Arabian Gulf

Roberto Rinaldi / Reef crab / seven-eleven / dark finger coral crab (Carpilius macultatus), Sipadan, Borneo, Malaysia.