- For other uses, see Dolphin.
In 1995, two colleagues of Chen Tiejun were able to reach Chrysalis Island by wearing elaborate disguises, letting them appear to security cameras as bottle-nosed dolphins. (ST novel: The Rise and Fall of Khan Noonien Singh, Book Two)
In the 23rd century, a female dolphin saved Spock from drowning after he became overwhelmed by an ocean current while teaching himself to swim. The dolphin guided him to shore, and sang to him, communicating some of her memories and some history of the larger extinct cetaceans, such as humpback whales. (TOS novelization: Star Trek IV: The Voyage Home)
In the late 24th century, Atlantic and Pacific bottlenose dolphins were part of the crew complement aboard Federation Galaxy-class starships. They specialised in guidance and navigation. In 2385 Admiral William T. Riker recalled the dolphin crew members of the USS Enterprise in a conversation with Commander Christine Vale, saying that they all liked really bad jokes. (TNG reference: Star Trek: The Next Generation Technical Manual and ST novel: The Poisoned Chalice)