虎鲨的英文：
a bullhead shark

参考例句：

The tiger-sharks range in length from nine to fourteen [between nine and fourteen] feet.
虎鲨体长从9至14英尺不等。

bullhead是什么意思：
n. 大头鱼,鳅之类,顽固的人
shark是什么意思：
n. 鲨鱼；骗子
v. 诈骗；敲诈

shark for a living
以诈骗为生

And will talk in contemptuous tones of the Shark.
它洋洋得意地同鲨鱼攀谈。

The shark savaged the swimmer.
鲨鱼残害了那个游泳者。

We helped them, but they shark up!
我们帮助那些人，结果却被敲诈！

Yes, that is a shark's back fin.
对，那就是鲨鱼背上的鳍。