Starfish shrimp

''Periclimenes soror'', also called the starfish shrimp is a species of shrimp that lives as a symbiont with starfishes.''Periclimenes soror'' is a species of little shrimp with a truncated rostris, and showing a wide variety of coats, but often with a distinctive white stripe or white dots pattern on the back. The rest of the body varies with the host starfish: it is often "a deep purple red" when living on ''Culcita'', ''Protoreaster'' or ''Pentaceraster'', but red with a white dorsal stripe when living on ''Acanthaster'', and can also be transparent Adults reach up to 15 millimetres long.