Scuba Diver and Anax Sea Cucumber, Thelenota anax, North Male Atoll, Maldives

Yellow Sea Cucumbers, Colochirus robustus, Triton Bay, West Papua, Indonesia

Anax Sea Cucumber, Thelenota anax, North Male Atoll, Maldives

Vibrant sea cucumbers, tunicates, hydroids, and other invertebrates cling to a reef in Raja Ampat, Indonesia.

Both a Crinoid Commensal Shrimp (Periclimenes cornutus) and a Crinoid Squat Lobster (Allogalathea elegans) on a crinoid. These tiny crustaceans are commensal on crinoids or feather stars and take their color from the host, Philippines

Detail of the center branching arms of a Crinoid or Feather Star (Lamprometra klunzingeri) open and feeding on plankton at night, Philippines