Comatulida is an order of crinoids. Members of this order are known as feather stars and mostly do not have a stalk as adults. The oral surface with the mouth is facing upwards and is surrounded by five, often divided rays with feathery pinnules. Comatulids live on the seabed and on reefs in tropical and temperate waters.

Comatulida. Retrieved November, 05 2021, from en.wikipedia.org/wiki/Comatulida.

Antedonidae is a family of crinoids or feather stars in the phylum Echinodermata. Members of the family are unstalked and have ten feathery arms. They can move about freely and have clawed cirri to attach them temporarily to structures.

Antedonidae. Retrieved November, 05 2021, from en.wikipedia.org/wiki/Antedonidae.

Florometra serratissima is a species of crinoid or feather star in the family Antedonidae. It is found off the Pacific coast of North America, usually in deep water.

Florometra serratissima. Retrieved November, 05 2021, from en.wikipedia.org/wiki/Florometra_serratissima.