Biology/Natural History: E. quinquesemita is eaten by the sea stars Solaster stimpsoni and Dermasterias imbricata, and juvenile Eupentacta are a staple food for Leptasterias hexactis. Adults rarely expose their tentacles during daylight hours. Spawning occurs in the spring. Development is indirect, and eggs embryos, and larvae are greenish in color and occur in the Puget Sound plankton from in the spring.
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