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Noun: Gasterosteus pungitius
  1. Small freshwater fish with spines along its back
    "The Gasterosteus pungitius is smaller than its three-spined cousin";
    - ten-spined stickleback, ninespine stickleback, Pungitius pungitius

Type of: prickleback, stickleback

Part of: Gasterosteus, genus gasterosteus