A planktonic marine snail, with a reduced or absent shell; found in open oceanic waters; feeds mainly on other invertebrates; possesses lateral fins used in active swimming; also known as a pteropod. (Class: Gastropoda. Order: Gymnosomata.)
Portions of the summary below have been contributed by Wikipedia.
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Limacinidae |
Sea butterflies, or flapping snails, are holoplanktonic mollusks (Mollusca, Gasteropoda), belonging to the suborder Thecosomata (Blainville, 1824).
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