Looking like a bas-relief on an ancient tomb, three crinoids show a head, with segmented tentacles swept off to one side.

Crinoids were stalked echinoderms. Composed of multiple plates, crinoids often decompose immediately after death. Almost 550 species of crinoids still live in the ocean, eating plankton or detritus with the tube feet along their arms.
Courtesy: Earth History Resources.