管足 meaning in English

[动物学] sucker; ambulacral foot; tube-foot

They are found in seagrass , rubble - strewn sand bottom , and coral reef
海胆的管足比较长，用来爬行、呼吸、排泄及感应环境。
The sea urchin is a cousin of the starfish . it moves with the help of its spines and its tube feet , which are arranged in 5 columns up and down its body . the tube feet end in minute suction pads , which are able to grip any firm surface with which it comes into contact
海胆属于海星的近亲，利用身上的短针及五行由上而下排列的管足移动身体，每条管足尾部长有一细小的肉趾吸管，遇到坚硬的地方，便会紧紧抓著。