Cuvier's beaked whale
From Memory Alpha, the free Star Trek reference.
The Cuvier's beaked whale (Ziphius cavirostris) is an aquatic mammal indigenous to Earth. It is a cetacean species.
When Spock tried to match the sound of the whale probe to the sound of an Earth animal aboard the Klingon Bird-of-Prey HMS Bounty, a Cuvier's beaked whale was one of the animals shown. (Star Trek IV: The Voyage Home)
