The pink colour comes from the blood vessels under the dolphin's skin. These dolphins do not have blubber (a thick fat layer) to keep them warm the way most ocean dolphins do. Instead, lots of blood vessels close to the skin help them manage their temperature - and when the blood flows strongly, the pink shows through.
Hong Kong has even made the Chinese white dolphin one of its official animal symbols. You can see it on signs and logos around the city. Conservationists work hard to protect these dolphins because they live in busy, shallow waters close to ports and airports.
The dolphins live in family groups and communicate by clicking and whistling, just like other dolphins. Young calves stay close to their mothers for the first few years of life, learning what to eat and where to swim.
Dolphin-watching boat trips run from Hong Kong, heading out to the quieter waters near Lantau Island where the dolphins are most often seen. Spotting a pink dolphin leaping from the water is considered a lucky and joyful sight.