gill tuft

例句：

1. 1. The fish's gill tufts are visible through the water.
   鱼的鳍毛在水中可见。
2. 2. The scientist observed the gill tufts of the fish as it swam.
   科学家观察了这条鱼游动时鳍毛的变化。
3. 3. The gill tufts of the fish were covered in a layer of slime.
   鱼的鳍毛上覆盖着一层粘液。