Definition of sea butterfly in US English:

sea butterfly


  • another term for pteropod
    • ‘The divers visit a small skerrig surrounded by a kelp forest with nudibranchs, comb jellyfish and sea butterflies.’
    • ‘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.’