[Of course, although it's listed here the dolphin isn't a place - but it's an easier name to use than "waters in the Pearl River mouth, north of Lantau". And without the dolphin, these waters aren't really worth visiting.]

Chinese White Dolphin

Info from Hong Kong's Great Outdoors

Bubblegum pink when adults, Chinese white dolphins inhabit the waters of the Pearl River Estuary, including off north Lantau near the airport and Tai O.

Excursion on boat, such as with a dolphin watching tour (not a bogus “eco-tour”!), inc with Hong Kong Dolphinwatch.