I live in the sea.but I can not swim.I have five arms and hu

I live in the sea.but I can not swim.I have five arms and hundreds of feet.I have no brain at all.
who am 谁知道,
.

供参考
sea star 海星
再问： it有100只∠4吗
再答： 有很多的類似捲須物 以下是有關海星的介紹 lack a true centralized brain(缺乏真正的中央腦袋) Respiration occurs mainly through the tube feet, and through tiny structures called papullae that dot the body surface. These papullae are thin-walled projections of the body cavity, reaching through the muscular body wall and into the surrounding water. thin-walled projections (就是提及的類似捲須物體) 一百之數﹐應是概括之詞﹐指很多