Infra-order Brachyura, Family Grapsidae, Subfamily Sesarminae

Mottled crab | Metasesarma obesum  (Dana, 1851)

Christmas Island crabs, mottled crab, metasesarma obesum, Christmas Island, Max Orchard

A tiny crab with a squarish carapace up to about 20 mm wide. Color is widely variable.



Usually found under rocks, leaf litter and in rock crevices at the top of island beaches in the intertidal zone to 5 metres above sealevel.

Read more about Christmas Island's mottled crab in the book

"Crabs of Christmas Island" by Max Orchard

Mottled crab