Dolphin

Dolphin is loved by many people. They are very intelligent mammals, so I like them. They communicate with companions by supersonic waves.  They can understand what human beings say,so they are often used for dolphin show in aquarium. Their charming face, cool streamlined body and high jumping attract a large audience. Not only kids but also adults enjoy dolphin show. In addition, they are used for animal weapons and treatments. In the american navy, they detect underwater mines and rescue a diver. For animal therapy, they have potential to treat a mental illness. To sum up, they are good friends for human.