| 释义 |
sea butterflynounA small mollusc with wing-like extensions to its body which it uses for swimming.- Orders Thecosomata (with shells) and Gymnosomata (lacking shells), class Gastropoda.
The opisthobranchs include the sea slugs and their relatives the sea hares, sea butterflies, canoe shells, and others....- These all feed on pteropods, or sea butterflies, one of the species most threatened by rising acidity.
- The divers visit a small skerrig surrounded by a kelp forest with nudibranchs, comb jellyfish and sea butterflies.
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