ectotrophous

例句：

1. 1. The fish has an ectotrophous tail that helps it swim efficiently.
   这种鱼有一个外胚层的尾巴，有助于它高效游泳。
2. 2. The ectotrophous larvae of the butterfly are covered in tiny hairs.
   蝴蝶的外胚层幼虫覆盖着微小的毛发。
3. 3. Ectopterygians are a group of fish with ectotrophous bodies and gills.
   棘鱼是一类具有外胚层身体和鳃的鱼类。