Echinoderm - Wikipedia - As adults sea stars
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Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea. Common .. Some species of starfish are able to reproduce asexually as adults either by fission of their central discs or by autotomy of one or more of their. Echinoderm is the common name given to any member of the phylum Echinodermata of marine animals. The adults are recognizable by their (usually five-point) radial symmetry, and . These consist of the Crinoidea (feather stars and sea lilies, species) and the extinct blastoids and Paracrinoids. A fifth class of.