"Large crab with spiny carapace, long legs and claws. In particular the claws are very long and not fouled, unlike the rest of the body. Two robust spines between the eyes. (see photo 2)" Source : http://www.seadb.net/en_Decorator-crab-S...
Back reef, Coastal bay, Lagoon. Indo-Pacific
Spotted this Decorator Crab hiding beneath a sea urchin. Night Dive at Dive and Trek House reef.