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sea slug
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Tweet n. 1. Any of various highly colorful marine gastropods of the suborder Nudibranchia, lacking a shell and gills but having fringelike projections that serve as respiratory organs. Also called nudibranch. 2. Any of various other marine gastropods that lack a shell or have a reduced shell.  (click for a larger image) sea slugpyjama nudibranch Chromodoris quadricolor |
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