Yellowline Arrow Crab

Found on rubble and sandy areas of reefs, often associated with Sea Anemone Lebrunia danae. Very territorial.
They feed nocturnally on invertebrates and feather duster worms.

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.