Elasipodida

例句：

1. 1. TheElasipodida are a diverse groupof animals that live in water.
   水螅纲是一类生活在水里的多样化动物。
2. 2.The Elasipodida play an importantrole in the ecosystem by filtering andpurifying water.
   水螅纲在生态系统中通过过滤和净化水发挥着重要作用。
3. 3.The Elasipodida have unique adaptations for their environment, such as theability to change color and shape.
   水螅纲具有适应其环境的独特的适应性，如变色和变形的能力。