推荐回答(4个)
水母
水母由胶状物质和水(占其身体的97%)组成,所以它们大都是透明的,
看上去很美,但是却非常危险,夏季去海滨游泳的人,常常会被水母的触须刺到,产生很强的疼痛,有时甚至会致命.大多数的水母生活的浅海中,它们漂浮再海水表面,长长的触须一碰到猎物就会缠住它并使它麻痹,然后将猎物拖回来,一直拖到“嘴”里.
水母移动身体的方式使通过海水的吸入和排出完成的,这样的移动速度很慢,所以更多的时候它们是靠潮汐和水流来完成的.一旦水母上了陆地,马上就会瘪掉.
僧帽水母有一个很威武的别名——葡萄牙战舰,事实上僧帽水母是很多水母聚集在一起,形成的分工合作群体,它的触须可长达数米,由成千上万个毒性很强的刺武装着,千万别让它碰到你!
海蛰也是一种水母,人们把它的伞体切下来晒干就成了“海蛰皮”.目前所知的最长的水母是一种北极水母,它的展幅达75米.
水母是刺丝胞动物门的一员,它们的足迹遍布每一个海洋,无论是在海面还是深海区,我们都能看到它们的身影。很多水母透明程度极高,几乎让人看不到它们的存在。
水母由胶状物质和水(占其身体的97%)组成,所以它们大都是透明的。
水母看上去很美,但是却非常危险,夏季去海滨游泳的人,常常会被水母的触须刺到,产生很强的疼痛,有时甚至会致命。大多数的水母生活的浅海中,它们漂浮再海水表面,长长的触须一碰到猎物就会缠住它并使它麻痹,然后将猎物拖回来,一直拖到“嘴”里。
大部分水母并不是透明的。只有少部分,例如海月水母,桃花水母等才是透明的。主要是体内水分含量达,而且体内没有色素。
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