The unmistakable harlequin shrimp sitting on the arm of a blue sea star.

Here in less-common variation with red-brown blotches instead of blue blotches.

(Mandarinfish Reef, Lembeh Strait, Sulawesi, Indonesia)

arthropod; crustacean; decapod; shrimp; harlequin shrimp; Arthropoda; subP Crustacea; Malacostraca; Decapoda; subOrder Pleocyemata; infraOrder Caridea; superFamily Palaemonidae; Hymenoceridae; Hymenocera elegans, South Pacific