fin-tip

例句：

1. 1.The fish's fin tips were visible through the water.
   鱼的鳍尖在水面上可见。
2. 2.The angler carefully placed his fishing line to catch a fish at the fin tip.
   垂钓者小心翼翼地将钓线放置，以捕捉到鱼在鳍尖处。
3. 3. The scientist observed the behavior of fish in the fin tip region.
   科学家观察了鱼类在鳍尖区域的行为。