Respuestas
Dolphins, classified as cetaceans, are part of the family of toothed whales that includes orcas and pilot whales.
Delphinidae (Delphinidae), commonly known as ocean dolphins (to distinguish platanistoideos or river dolphins) are a family of toothed whales quite heterogeneous, comprising 34 species. Are between 2 and 9 meters long, fusiform body and large head, elongated snout and just a blowhole on top of the head (blowholes that many marine animals have as contact with air or water with their internal) respiratory system. They are strict carnivores. They are among the most intelligent species that inhabit the planet. They are relatively close to the coast and often interact with humans. Like other cetaceans, dolphins use sounds, dance and jump to communicate, orient themselves and achieve their prey; also they use echolocation. Today, the main threats to which they are exposed are of anthropic nature.