Hong Kong (CNN) A near constant wind buffets the top deck of Boat 36826 as it patrols the seas north of Hong Kong's largest island, Lantau. Charlotte Lau and Viena Mak from the Hong Kong Dolphin Conservation Society survey the waters near Lantau Island. Pink dolphins have lived in Hong Kong's waters for centuries. "It's such a common response: 'oh we have Chinese white dolphins, we have pink dolphins in our waters? A survey sheet, filled out by Hong Kong Dolphin Conservation Society employees, shows no sightings.

Source: CNN September 21, 2017 23:26 UTC