It had no arms and was a so-called " basket" feeder - taking water into and out of its upward facing mouth and filtering out suspended bits of organic stuff with a basket shaped structure.

它没有手臂，是一个所谓的“篮子”喂食器 - 将水进出其朝上的嘴巴，并用篮子状结构过滤掉悬浮的有机物。