The common bottlenose dolphin is the most familiar dolphin species due to the wide exposure it receives in captivity in marine parks and dolphinaria, and in movies and television programs. It is the largest species of the beaked dolphins. It inhabits temperate and tropical oceans throughout the world, and is absent only from polar waters. Until recently, all bottlenose dolphins were considered as a single species, but now the Indo-Pacific bottlenose dolphin and Burrunan dolphin have been split from the common bottlenose dolphin. While formerly known simply as the bottlenose dolphin, this term is now applied to the genus "Tursiops" as a whole. These dolphins inhabit warm and temperate seas worldwide. As considerable genetic variation has been described among members of this species, even between neighboring populations, many experts consider that additional species may be recognized.