Harlequin Swimming Crab, Lissocarcinus laevis

Harlequin swimming crab

This Harlequin Swimming Crab was sitting under an anemone. It looks like a boxer staring me down. I didn't retreat; I just moved over to a transparent shrimp on the same anemone. The crab about the size of a 50-cent piece. The transparent legs at the back (3 pairs) are used for swimming, and 2 brightly-colored pairs at the front for eating. I don't see one of the front pairs; maybe it's stowed out of sight.