hydromelia

例句：

1. 1. The jellyfish is a common sight in the ocean.
   水母是海洋中常见的生物。
2. 2. The hydromelia is a fascinating creature that can change color and shape.
   水螅是一种令人着迷的生物，它可以改变颜色和形状。
3. 3.The hydromelia is an important part of the ecosystem, as it helps to control the population of other marine animals.
   水螅是生态系统的重要组成部分，它有助于控制其他海洋动物的数量。