#stickleback__prickleback small (2-4 inches) pugnacious mostly scaleless spiny-backed fishes of northern fresh and littoral waters having elaborate courtship; subjects of much research supertype: spiny-finned_fish__acanthopterygian a teleost fish with fins that are supported by sharp inflexible rays member of: family_Gasterosteidae subtype: three-spined_stickleback__Gasterosteus_aculeatus of rivers and coastal regions subtype: ten-spined_stickleback__Gasterosteus_pungitius confined to rivers
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