Dolphins are one of the large size of sea animals and dolphins are included in the class of mammals. Like most other sea animals dolphins are carnivores (meat eaters) are generally the dolphins eat, food is less from him. dolphins including intelligent and friendly animals, so some of them trained by humans to serve as entertainment in the attractions at the circus. While in the middle of the open sea, sometimes we see a collection of dolphins swim by jumping up and down to follow our tack, as if the dolphins are not afraid of human existence, until there are some stories we've ever heard of course about the man who was saved by dolphins dolphins at sea. it proves that these animals are very familiar with human life.