A Pacific bottlenose dolphin, or Tursiops truncatus gillii, was a cetacean mammal native to the oceans of planet Earth. In the late 24th century, Pacific bottlenose dolphins were part of the crew of Federation Galaxy-class starships. They were guidance and navigation specialists working in cetacean ops and the cetacean navigation labs, and were part of a consultation crew of twelve, which included Atlantic bottlenose dolphins. (TNG references: Star Trek: The Next Generation Technical Manual, Star Trek: The Next Generation USS Enterprise NCC-1701-D Blueprints)