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深海鱼类是人们在鱼市场上和水族馆里见不到的鱼。因为它们生活在200～6000米深的大洋性深海中。就是专门研究它们的鱼类学家,也只有机会接触死标本,而看不到活鱼。 由于水太深,太阳光线照射不到,所以深海中是黑暗的;同样的原因,深海处于高压中,如深度是6000米处,就达600个大气压;又深又暗的地方,当然温度就低 我们可以想象出,这是多么恶劣的环境。但是据古生物学家记载,早在1.35亿年前的白垩纪的地层中就有了它们的化石。在漫长的环境变化中,它们逐渐演变达到个体形态与
Deep-sea fish are fish that people can not see in fish markets and aquariums. Because they live in deep oceanic depths of 200-6,000 meters. It is the fish scientist who specializes in them and only has the chance to touch dead specimens and can not see live fish. Because the water is too dark, the sun is dark, so the dark sea is dark; the same reason, the deep sea in high pressure, such as the depth is 6000 meters, up to 600 atmospheres; deep and dark place, of course, the temperature Low We can imagine how bad this is. However, according to paleontologists, fossils were found in the Cretaceous strata 135 million years ago. In the long period of environmental change, they gradually evolve to achieve individual shape and