• Antedon is commonly known as feather star.

• Body consists of a central disc or calyx and a series of five radiating arms.

• Central disc is differentiated into an upper oral surface and lower aboral surface.

• Oral surface is covered with a soft and leathery skin, the tegmen bearing the central mouth and the anus on a papilla in an inter-radius.

• Aboral surface bears several slender curved jointed cirri supported by small ossicles which serve for attachment.