Winter was a bottlenose dolphin at the Clearwater Marine Aquarium in Clearwater, Florida, United States, and was widely known for having a prosthetic tail. Winter was the subject of the 2009 book Winter's Tale, the 2011 film Dolphin Tale, and its 2014 sequel.

Bottlenose dolphins are toothed whales in the genus Tursiops. They are common, cosmopolitan members of the family Delphinidae, the family of oceanic dolphins. Molecular studies show the genus contains three species: the common bottlenose dolphin, the Indo-Pacific bottlenose dolphin, and Tamanend's bottlenose dolphin. Others, like the Burrunan dolphin, may be alternately considered their own species or be subspecies of T. aduncus. Bottlenose dolphins inhabit warm and temperate seas worldwide, being found everywhere except for the Arctic and Antarctic Circle regions. Their name derives from the Latin tursio (dolphin) and truncatus for the truncated teeth.