larval fish

例句：

1. 1. The larvae of the fish are tiny and help to build their bodies.
   这些鱼类的幼虫很小，帮助它们构建身体。
2. 2. The scientists studied the larvae of this species for clues about its future.
   科学家们研究了这种物种的幼虫，以寻找关于其未来的线索。
3. 3. The larvae of the butterfly are covered in a layer of wax.
   蝴蝶的幼虫覆盖着一层蜡。