The outline of the body is akin with Asteroidea for ophiuroids have 5 arms which is connected with a central disk.    From Wordnik.com.  [CreationWiki - Recent changes [en]] Reference

(arthropods), class Crustacea, crabs - Phylum Echinodermata, classes Asteroidea, sea stars.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference