Crinoid from the Family Mariametridae, in the shallow reefs off Freewin Wall, near Waigeo Island, Raja Ampat, Indonesia, Southeast Asia, Asia

Crinoid from the Family Mariametridae, in the shallow reefs off Bangka Island, Indonesia, Southeast Asia, Asia

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