Description

Also known as Brachyura Crab, Lightfoot Crab, Mottled Crab, Mottled Lightfoot Crab, Mottled Sally Lightfoot, Mottled Sally Lightfoot Crab, Pale-lined Tropical Rock Crab, Rock Runner Land Crab, Rocky Shore Crab, Sally Longlegs, Shore Crab, Swift-footed Crab, Swift-footed Rock Crab, Talon Crab, True Crab.

Found singly or in a consortium on intertidal coral and rocky reefs and rocky shores, clinging to jetties, beach rocks and walls, or resting on rocks outside the water. Very shy will disappear into cracks in the rocks when approached.
They feed on crustaceans, detritus, fish and seaweeds.
Length - 6cm
Depth - land-10m
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: https://en.wikipedia.org/wiki/Grapsus_albolineatus