bottlenose dolphin, (genus Tursiops), any of two or three species of oceanic dolphins classified within the marine mammal family Delphinidae and characterized by a bottle-shaped snout. The common bottlenose dolphin (Tursiops truncatus), which is the most widely recognized dolphin species, is found worldwide in warm and temperate seas. In contrast, the Indian Ocean bottlenose dolphin (T. aduncus) inhabits continental shelf areas of the Indian Ocean and the waters fringing Southeast Asia, Indonesia, and Australia. The...