Any of various wormlike marine invertebrates of the phylum Pogonophora that grow in upright chitin tubes, usually at depths greater than100meters(330feet, have tentacles attached to the head region, and lack a digestive system.

• 须腕动物须腕门中的一种蠕虫状海生无脊椎动物，生长在直立的甲壳质管中，通常在100米（330英尺）以下的水中生活，有附于头部的须毛，而缺少消化器官