If a detached arm includes part of the central disc, then the arm can regrow into a new star
Because they rely on their tubefeet (which fill with water to expand and contract) for movement, sea stars can only move if they are in water.
Citations & Other Resources
Hiebert, T. C., B. A., Butler, A. L., Shanks. 2016.Oregon Estuarine Invertebrates: Rudys’ Illustrated Guide to Common Species, 3rd Edition. University of Oregon Libraries and Oregon Institute of Marine Biology.
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