Pilumnus vespertilio
Carapace hexagonal, densely setosed with a few regions defined, frontal region with quadrilobed with prominent medial notch. Anterolateral margin with three teeth. Chelipeds nearly equal in size. Male abdomen somites 3-5 are moveable.
Vernacular name: Hairy crab.
The long setae of this crab traps dirt and mud, which helps it to maintain an effective camouflage in reefs. In addition, there have been reports that they are slightly poisonous.
Order Decapoda Latreille, 1802
Infraorder Brachyura Latreille, 1802
Section Eubrachyura de Saint Laurent, 1980
Subsection Heterotremata Guinot, 1977
Superfamily Xanthoidea, MacLeay, 1838
Family Pilumnidae Samouelle, 1819
Subfamily Pilumninae Samouelle, 1819
Pilumnus vespertilio (Fabricius, 1793)
Red Sea, East Coast of Africa, to Hawaii, including, Thailand, Singapore, South China, Japan and Australia.
Low intertidal reef or rocky shore.