A bottlenose dolphin or Atlantic bottlenose dolphin ("Tursiops truncatus") is a kind of dolphin. The name "bottlenose" comes from its snout being shaped like a bottle. It breathes through a hole on top of its head. Its brain is very large, and it is one of the most intelligent animals. Bottlenose dolphins are closely related to porpoises. They are skilled and accurate hunters which eat small fish. 