All fishes are vertebrates (animals with backbones) with gills for breathing, and most of them have fins for swimming, scales for protection, and a streamlined body generally with a pointed snout and posterior and a broad propulsive tail for moving easily through the water.
- vertebrate [ˈvə:tibrit] n.脊椎动物
- backbone [ˈbækbəun] n. 脊椎
- gill [dʒil] n.腮
- fin [fin] n.鱼鳍
- scale [skeil] n.鱼鳞
- streamlined [ˈstri:mlaind] adj.流线型的
- snout [snaut] n. 口鼻部
- posterior [pɔˈstiəriə] n.身体后部
- propulsive [prəˈpʌlsiv] adj. 有推进力的
