small (2-4 inches) pugnacious mostly scaleless spiny-backed fishes of northern fresh and littoral waters having elaborate courtship; subjects of much research
造句
用作名詞(n.)
Similar principles underlie the evolution of new body forms in completely wild populations of stickleback fish. 從完全野生的族群演化出新體形的棘魚，也是透過類似的原則。
British researchers studying the behavior of tiny stickleback fish have found that they are much more willing to take risks in search of food in pairs than alone. 英國研究者通過研究小棘魚的行為發現比起自己一個人他們更愿意冒險與伙伴一起外出覓食。
常用短語
A male stickleback in full spring colours (red underneath, greenish blue on the back).