aquatic vertebrate

Noun
  1. Animal living wholly or chiefly in or on water (synset 101476447)
    hypernym: craniate, vertebrate - animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium
    hyponym:
    • agnathan, jawless fish, jawless vertebrate - eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms
    • placoderm - fish-like vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws
    • fish - any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills
    part holonym: flipper - the flat broad limb of aquatic animals specialized for swimming

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