- 海豚座 hǎitúnzuò DelphinusDelphinus; a small but distinct constellation in the northern sky located south of Cygnus and northeast of Aquila
- 海豚馆 hǎitúnguǎn dolphinariuma facility where dolphins are kept and shown to the public
- 瓶鼻海豚 píngbíhǎitún bottlenose dolphinbottlenose dolphin (Tursiops truncatus)
- 鼠海豚 shǔhǎitún porpoise
- 海豚泳 hǎitúnyǒng dolphin butterflyA swimming style derived from the [[蝶泳|蝶泳|die2 yong3]], featuring arm movements similar to the butterfly stroke but with legs kicking together like a dolphin's tail.
- 宽吻海豚 kuānwěnhǎitún bottlenose dolphinbottlenose dolphin (Tursiops truncatus)
