背部背鳍
Dorsal fin on the back
以上为机器翻译结果，长、整句建议使用 人工翻译 。
它们的背部是军舰的灰色，最上方是呈锯齿状的黄色背鳍。
Their backs were battleship gray topped with a saw-toothed line of small yellow dorsal fins.
youdao
驼背鲸有一个较小的背鳍，大约是背部三分之二接近尾部的中央。
The humpback has a small dorsal fin located towards the tail flukes about two-thirds of the way down its back.
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