浮浪幼体腔肠动物其扁平的，能自由浮游的，有纤毛的幼体。
钟虫一种钟虫属有纤毛的原生动物，具有铃状的身体，常连在一个植物或其它物体的细茎上并居住于水下。
Any of various ciliate protozoans of the genus Vorticella, having a bell-shaped body and living underwater on a slender stalk often attached to a plant or other object.
内层的黏膜有纤毛，向内突出以挡住微粒。
An inner mucous membrane has cilia (see cilium) that project inward to trap particles.
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