Bottlenose dolphin
The bottlenose dolphin (Tursiops truncatus) was an aquatic mammal indigenous to Earth. It was a cetacean species.

When Spock tried to match the sound of the Whale Probe to the sound of an Earth animal using the phylum search mode from 's computer database, a bottlenose dolphin was one of the animals shown. ()

Harry Bernard successfully carved a wooden statue of a bottlenose dolphin with a device that emitted a pink/orange beam while in the forced custody of the Aldean natives Accolan and Leda. ()

In 2365, a turbolift door close to a holodeck entrance was labeled Tursiops crew facility. (; )

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Earth animals