brittle star

any of a subclass (Ophiuroidea) of echinoderms having a central disk and five long, narrow, easily breakable arms that can quickly regenerate

See brittle star in American Heritage Dictionary 4

noun
Any of various marine organisms of the class Ophiuroidea, related to and resembling the starfish but having long slender arms. Also called ophiuroid.

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brittle star

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