Definitions of prickleback
  1. noun
    small elongate fishes of shallow northern seas; a long dorsal fin consists entirely of spines
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    Lumpenus lumpretaeformis, snakeblenny
    found in Arctic and northern Atlantic waters
    eellike fishes found in subarctic coastal waters
    type of:
    blennioid, blennioid fish
    elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins
  2. noun
    small (2-4 inches) pugnacious mostly scaleless spiny-backed fishes of northern fresh and littoral waters having elaborate courtship; subjects of much research
    synonyms: stickleback
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    Gasterosteus aculeatus, three-spined stickleback
    of rivers and coastal regions
    Gasterosteus pungitius, ten-spined stickleback
    confined to rivers
    type of:
    acanthopterygian, spiny-finned fish
    a teleost fish with fins that are supported by sharp inflexible rays
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