The dolphins are not fish, but mammals, like a monkey, dog, cat, bear, or I, but the dolphins have evolved to live in water, like "the whale"
.The dolphins adapt to develop shapes and organs. Suit to live in water
shape. The dolphins have slender shape like a rocket head skin smooth, hairless, and a big tail allows swim fast
.The respiratory system, the dolphin, change the channel, breathing or short nose to stay on top of the head. In order to make it easy for breathing when he came up out of the water. And to snorkel or trachea is separate to the oral cavity. To eat dolphin underwater
.The lungs are smaller than men, but can use the oxygen in the air. Dolphins can stay in the water for longer than people and dive deeper than people.
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