Description

Also known as Brachyura Crab, Commensal Crab, Coral Crab, Coral Guard Crab, Rusty Guard Crab, Swimmer Crab, Trapeze Crab, True Crab.

Found hiding during the day, between the finger-like branches of hard coral formations of Acropora and Pocillopora. At night they spread their arms to feed over coral and rocky reefs.
They feed nocturnally on coral mucus, tissue and zooplankton.
Length - 1.5cm
Depth - 0-50m
Widespread Indo-Pacific

Brachyura crabs are considered true crabs, they have a short abdomen, 4 walking legs and a pair of clawed arms at the front.
Many thousands of species live worldwide in sea water, fresh water and on land. Ref: x