Dolphins (Delphinus Delphis) are animals that are closest to human existence, heroic stories often emerge how the dolphin helped save humans when there was a disaster in the middle of the sea. However, the animals are almost extinct population is reduced, and that is the result of human activities as well as due to the destruction of their habitat by humans who do fishing with fish bombs, commercial needs, sea water pollution, caught fishing nets or crashing ships. The life span of dolphins between 4 - 50 years varies depending on their habitat and environmental conditions, shorter than human life.
Even in some places the dolphins are intentionally captured and raised to entertain humans by utilizing their intelligence to engage in sports, so that it can be a place of recreation, tourist spectacle shows such as dolphins can jump into fire circles, or swim with them, play ball, for animal and animal lovers, of course this is quite unfortunate, because their habitat must be in the wild, not in a small pond.
Some unique and interesting facts about dolphins or dolphins is that, apart from intelligent marine mammals over chimpanzees, these animals breed and breastfeed so they are known as marine mammals, breathing with the lungs through the air holes above their heads, so they can survive the dolphins The dolphins have to take air by appearing to the surface of the sea to breathe, they need about 20 to 30 seconds to be at sea level, so that certain times that are usually their habitat, dolphins or dolphins are seen jumping into the air to get oxygen .
Another unique fact about dolphins or dolphins, they always live in groups, so that they are better known as flocks who play together and find and trap prey together. The sense of smell of the fish is not very good, so that the dolphins communicate and find food with a sonar system (whistling sound) like a whistle that gives a signal, the sound is reflected, the echo sound that can be captured again to find out the surroundings, whether to find prey or knowing danger. Voice communication, indicating the senses of hearing of dolphins is very good, even 10 times better than human hearing.
Its slippery skin minimizes friction with water so it is very agile and can easily jump into the air and has a maximum energy of up to 40km / hour. The senses of touch are also very good, so it is very sensitive, the combination of these senses is used by dolphins to find food, avoid danger and socialize.
The skin color is more dominant, bluish gray is very sensitive to human touch, especially with other hard objects, but there are some rare species of pink and white, because there are at least 43 species of dolphin animals, recorded 38 of these species live in the sea and 5 others live in fresh water, but now these freshwater dolphins are even almost extinct, in Indonesia alone can be found on the Mahakam river.
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