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第585章 伊娃老师(1 / 2)

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伊娃失笑道:“什么食人鱼?你不知道吗?这是大洋洲肺鱼,整个大洋洲最濒危的物种之一呀,它们怎么会出现在这里?”

“肺鱼?”王博问道,“就是那种长着肺的鱼?那种能离开水也能活好长一段时间的鱼?”

他听说过这种鱼,不过在中国的时候没见过,这种鱼诞生于数亿年前,是一种和腔棘鱼类相近的淡水鱼。

虽然名字叫鱼,其实它也有很多方面和两栖类动物相近,比如在软组织的构造、发育、生理和行为方面就有许多性状与现生两栖类接近而不同于其他现生鱼类。

伊娃笑着点头,给他们介绍道:“对,就是它们,这是一种特殊鱼类,在水里的时候可以用鳃呼吸,但它有个特殊的鱼鳔,让它离水后依然可以呼吸空气。”

“这种大洋洲肺鱼现在已经很少了,据说只有澳大利亚有不足一千条,全在保护之中,没想到新西兰依然有这种鱼。”

小萝莉哭丧着包子脸问道:“它们不是食人鱼吗?它们把我咬伤了。”

伊娃亲了她小手一口,说道:“是你先招惹它们的,黛儿,不要以为淡水鱼没有攻击性,肺鱼拥有特殊的牙齿呢,就像两列大厚板,它们齿尖向前,可以用来砸碎水底动物的甲壳来食用。”

王博嘿嘿笑道:“你知道这叫什么吗黛儿?这就叫肺鱼急了也咬人。”

看着小萝莉闷闷不乐,伊娃给她梳梳头发,柔声说道:“你知道吗,这种鱼可好玩了,它们大多生活在澳大利亚的北部沙漠,当旱季来临之后,它们生活的池塘会变成泥坑,这时候它们就会在泥坑中挖洞,然后开始分泌一种能硬化成类似茧的保护膜的黏液。”

“这些黏液能维持一定湿度,还能让空气进入。同时,它以自己的肌肉与脂肪当作养分维生,并将新陈代谢率降到原来的的六十分之一,大约不到正常的2%。随后,你知道它们会干什么吗?”

听到她讲解这些知识,小萝莉来了兴趣,好奇的问道:“干什么呢?”

伊娃耸耸肩道:“你想想,我给你说过的,比如伞蜥,它们夏天会干什么?”

“夏眠!”小萝莉高兴的说道。

伊娃微笑道:“对,它们会很神奇的进行夏眠,是不是很好玩?”

“没有水,它们也能活下去吗?”

“活很久呢,我看新闻,说在非洲的突尼西亚偏远农村中,曾发现肺鱼因在泥中挖洞躲避干旱,结果被做成了泥砖,它就依靠下雨时候滋润进泥砖里的水汽来存活,4年后雨水与时间不断侵蚀,泥砖被破坏,肺鱼趁着一场大雨脱逃了出来。”伊娃将一些故事娓娓道来。

王博不信:“这是假的,对吧,这种鱼不可能真的在泥砖里生活四年。”

伊娃摇摇头微笑道:“谁知道呢,我们没有去现场看过,不过它们确实是离开水后存活能力最强的一种鱼,甚至它们不能一直待在水里,每隔着一段时间得脱离水面呼吸空气。”

确实,王博和小萝莉在岸边等了一会,有两条肺鱼先后爬到了小溪旁边的草丛里。

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