Amphicoela

例句：

1. 1. The amphicoela was a rare species found in the ocean.
   这种生物是海洋中的一种罕见物种。
2. 2. The amphicoela had adapted to their environment by changing their behavior.
   这种生物已经适应了他们的环境，通过改变行为来适应。
3. 3. The amphicoela is a fascinating creature that has fascinated scientists for decades.
   这种生物是一个令人着迷的生物，几十年来一直吸引着科学家的关注。