海豚是与鲸鱼和豚鼠密切相关的哺乳动物。海豚有一个强大而精简的身体。它们在所有海洋和海洋中都有。海豚可以通过鼻子的鼻子与porpoises讲述，这是喙状的，也是他们的圆锥形牙齿。porpoises有一个平坦的鼻子，尖锐的牙齿和更坚固的身体。有32种红海豚。瓶鼻的海豚往往是水生秀中使用的物种。常见的海豚激发了大量地中海民间洛尔。上面的两只海豚出现在开阔的水域中，通常在游轮周围。他们喜欢在船上炫耀。 There are also freshwater dolphins that live in rivers of Asia and South America. The Buffeo dolphin has been spotted up to 1250 miles up the Amazon River. The Buffeo is the smallest of all dolphins averaging about 4 feet. The bottlenose is closer to 10 feet. The killer whale, which is also considered a dolphin, can grow to be 30 feet long. The pilot whale is also considered a dolphin. Dolphins were once hunted by commercial boats for the small amount of oil that can be extracted from their body.
这种油用于润滑手表的小零件。已经发现更便宜的油，所以海豚不再猎杀这个原因。
海豚可以通过意外捕获金枪鱼网。由于海豚不得不在他们淹没在金枪鱼网的表面上呼吸。据估计，1959年至1972年，在金枪鱼网中丧生了480万只海豚。由于动物权利，动力激动人员的压力，金枪鱼消费者不会接受来自不保护海豚的工厂的金枪鱼。动物权利活动家也认为海豚不应该以水生秀在囚禁中使用。海豚在一天内吃了很多食物，通常大约三分之一的体重。海豚的饮食主要由鱼和鱿鱼组成。海豚可以非常快地游泳，所以他们能够轻松地抓住食物。海豚有200到250颗锋利的牙齿。海豚在群体中追随鱼的学校。太平洋白板物种估计以成千上万的成员组成，而另一方面，另一方面，瓶内海豚以少数成员的群体行进。 Dolphin, like whales, breathes through a blowhole in the top of their head. While traveling dolphins break the surface once every two minutes. When dolphins exhale water is sometimes thrown from the blowhole. After exhaling the dolphins inhale and disappear into the ocean. Dolphin’s lungs are adapted to resist the physical problems that are caused by quick changes in pressure. With this adaptation dolphins can dive up to 1000 feet with no problem. A dolphin’s tail is, like all other aquatic mammals, moves in an up and down motion. Dolphins double fluke their tale to move forward. Their flippers are used to stabilize the dolphin as they swim. A dolphin is very streamlined and can average a speed of up to 19 miles per hour with bursts of over 25 miles per hour. At these speeds, dolphins can cover great distances in a day.
最佳研究的海豚种类是瓶子。瓶鼻海豚在女性和6至13岁的女性中达到了5至12岁的性成熟。海豚在春天伴侣。海豚携带婴儿，称为小牛，11至12个月。此时单个小牛诞生，首先出来尾巴。犊牛可以在出生后游泳和呼吸分钟。小牛将护理长达18个月。小牛可以通过封闭和利用母亲的空气动力学游泳来跟上他们的母亲。海豚几乎总是发出单击声音或吹口哨。点击次数是每秒约300个声音的短脉冲，这来自位于海豚孔的机制之下。 These clicks are used to locate objects around a dolphin. When the sound of a click bounces off of an object and back to the dolphin, the dolphin uses that information to move without hitting anything. This clicking system is similar to a bats radar system. The whistles are single-toned squeals that come from deep in the larynx. These whistles are used to communicate alarm, sexual excitement, and perhaps other emotions. Because of dolphin’s ability to learn and perform complex tricks in captivity, their continuous communication with one another, and their ability, with training, to understand a few human words, some scientists think that dolphins could learn a language to communicate with humans. Most experts agree that even though a dolphin’s problem-solving ability is close to that of a primate, no evidence has been shown that dolphin’s communication skills even come close to the complexity of a true language. All dolphins belong to the order of Cetacea. The bottle-nosed dolphin is scientifically classified as Tursiops truncatus. The common dolphin is classified as Delphinus delphis, and the buffeo dolphin is classified as Sotalia fluviatilis. The killer whale is classified as Orcinus orca and the white- sided dolphin is classified as Lagenorhynchus obliquidens.
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