Commensal Shrimp associated with Starfish, Periclimenes soror, Ambon, Moluccas, Indonesia

A sea star shimp (Periclimenes soror), swims through a forest of spines on the back of a crown-of-thorns starfish, Micronesia, Pacific

Hawaii, Commensal Shrimp (periclemenes soror) and Reticulated Brittle Star (ophiocoma brevipes) on Cushion Starfish (culcita novaeguineae).