Cirri of Common Crinoid, Lamprometra palmata, Russell Islands, Solomon Islands

Tentacle of Common Crinoid, Lamprometra palmata, Russell Islands, Solomon Islands

A colony of elkhorn coral (Acropora palmata) grows on a healthy reef in the Caribbean Sea.

Trumpetfish (Aulostomus maculatus) swims next to elkhorn coral (Acropora palmata), Molasses Reef, Key Largo, Florida, United States of America, North America

Kelp (Laminaria hyperborea) and dulse ( Palmaria Palmata) exposed at low tide, St. Brides Haven, Pembrokeshire, Wales, UK, Europe

Kelp (Laminaria hyperborea) and dulse ( Palmaria Palmata) exposed at low tide, St. Brides Haven, Pembrokeshire, Wales, UK, Europe

Madagascar frog species (Paradoxophyla palmata), rain forests of Andasibe, Madagascar, Africa, Indian Ocean

Close-up of Elkhorn Coral (Acropora Palmata) underwater, Roatan, Bay Islands, Honduras

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