Hoi Ha Wan
Info from Hong Kong's Great Outdoors
Small bay which is best known for its hard corals – 58 of Hong Kong’s 88 hard coral species are found here, and protected in a marine park.
Perhaps visit only if you are confident of truly experiencing the marine life; certainly not on a badly run, bogus “eco-tour”. Minibus 7 from Sai Kung.
Hoi Ha Wan article on this site
Hoi Ha Wan Marine Park - on foot