Whales are completely aquatic mammals。鲸鱼是完全水栖的哺乳动物。They look very similar to fish。外形看起来和鱼很相似。Their body length is usually between 1 and 30 meters。身体长度一般在1米-30米之间。
Their skin is bare, their snout has very little hair and their skin is thick with fat。仅吻部有很少的毛，皮下有厚厚的脂肪。
These fats help maintain body temperature, and when they live in water, they reduce body weight and are good for swimming。这些脂肪有助于保持体温，当它们在水中生活时，这些脂肪能减少身体比重，有利于游泳 。
扩展资料：
鲸鱼的种群现状：
由于环境恶化和人类的大量捕杀，鲸目成员特别是一些大型成员由于经济价值高而受到广泛捕猎，许多鲸类已濒临灭绝。国际捕鲸委员会（IWC）是一个负责管理捕鲸和鲸类保护的国际性组织。在商业捕鲸导致鲸数量锐减后，IWC决定采取行动保护鲸类。
其中包括从1986年开始暂时性禁止商业捕鲸，分别于1979年和1994年建立了印度洋鲸类保护区和南大洋鲸类保护区。然而从1986年以来，因为日本、挪威等一些国家利用了IWC决议的漏洞，打着“科学捕鲸”的旗号每年捕杀了至少2,5000头鲸或海豚。
参考资料来源：百度百科—鲸鱼
温馨提示：答案为网友推荐，仅供参考
第1个回答 推荐于2017-11-22
参考：
鲸是海洋哺乳动物中鲸目生物的俗名，又分为齿鲸类和须鲸类，鲸目之下包括有海豚科。
The whale is the cetacean marine mammals in the name, and is divided into toothed whales and baleen whales, including dolphins under cetacea.
鲸生活在海洋中。鲸的表皮下有极厚的脂肪层，即鲸油，它可以使鲸体保持温暖，而且也能贮存能量以供应不时之需。由于鲸鱼体内拥有许多特殊的构造，使它能够长时间的在水中屏住呼吸、减缓心跳速度，因此当它沉到海底，总要经过一段长时间后才会再浮出水面。除了具有贮存氧气的构造外，当身体某个部位需要大量的血液供应时，体内会有集中供应的特殊机能。
Whales live in the ocean. The whale skin thick layer of fat, blubber, it can render whales body to keep warm, but also can store energy to supply a rainy day. Because whale has a lot of special structure, so that it can hold your breath for a long time in the water, slow down the heart rate, so when it sank to the bottom of the sea, always after a long period of time before the surface. In addition to the structure with the storage of oxygen, when the body needs a large number of parts of the blood supply, the body will have a special function of centralized supply.本回答被网友采纳
鲸是海洋哺乳动物中鲸目生物的俗名，又分为齿鲸类和须鲸类，鲸目之下包括有海豚科。
The whale is the cetacean marine mammals in the name, and is divided into toothed whales and baleen whales, including dolphins under cetacea.
鲸生活在海洋中。鲸的表皮下有极厚的脂肪层，即鲸油，它可以使鲸体保持温暖，而且也能贮存能量以供应不时之需。由于鲸鱼体内拥有许多特殊的构造，使它能够长时间的在水中屏住呼吸、减缓心跳速度，因此当它沉到海底，总要经过一段长时间后才会再浮出水面。除了具有贮存氧气的构造外，当身体某个部位需要大量的血液供应时，体内会有集中供应的特殊机能。
Whales live in the ocean. The whale skin thick layer of fat, blubber, it can render whales body to keep warm, but also can store energy to supply a rainy day. Because whale has a lot of special structure, so that it can hold your breath for a long time in the water, slow down the heart rate, so when it sank to the bottom of the sea, always after a long period of time before the surface. In addition to the structure with the storage of oxygen, when the body needs a large number of parts of the blood supply, the body will have a special function of centralized supply.本回答被网友采纳
第2个回答 2021-01-01
第3个回答 2020-01-31
s s s s a aa s r y h y g t ce x h h t j r
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