The dolphins are as intelligent as humans

Dolphins are animals that are closest to human existence, heroic stories often arise how the dolphin helps save humans in the midst of the sea. Nevertheless, the animal's existence is almost extinct, the population is reduced, and that is the result of human activities as well because of the destruction of their habitat by humans who do fishing with fish bombs, commercial needs, seawater pollution, caught fishing nets or crashed ships. Dolphin life span of 4 - 40 years, vary depending on the habitat and environmental conditions, shorter than the human life.