海星有什么特点?

2025-04-05 15:49:15
推荐回答(2个)
回答(1):

色彩艳丽,再生能力强。

  1. 海星体色鲜艳夺目,而且色彩繁多。 身体由中央盘和由此而出的腕组成,腕 数典型的为五条,也有较多的可达20多 条。它们的中央体盘背面微微隆起,腹面下凹,而且有口。

  2. 海星拥有神奇的再 生能力,无论被砍去一条腕或被其他的动物咬掉一条腕,不久都会长出新腕。 再生能力很强的砂海星,只要还有1厘 米长的腕存在就可以再生成一个完整的新海星,这就等于说将它们砍成几块,就 帮它们新添了几个成员。

  3. 只有将其放在陆上晒干才可使它们永远不能复活。海 星相当贪婪而且食量颇大,一只海星的幼体一天吃的食量比自身重量的一半还 要多。每当发现蛤等猎物时,它们都会将其捉住,把蛤壳顶朝下,腹缘朝。

  4. 例如,沙海星保留一厘米长的腕就能生长出一个完整的新海星,而有的海星本领更大,只要有一截残臂就可以长出一个完整的新海星。海星的腕、体盘受损或自切后,都能够自然再生。海星的任何一个部位都可以重新生成一个新的海星  。

回答(2):

海星为什么能够在生?

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