We were sailing our from Cheung Sha beach yesterday morning and passing Shek Kwu Chau we saw about 4 finless porpoise - but no closer than 50m from the boat. An hour later - about 9am we were between Cheung Chau and Lamma and saw a group of 6+ dolphins. They appeared to be even grey colour, only saw dorsal fins and backs so not enough to identify what species but not pale or pink ones. They appeared to be 2-3m long - some were within 10m of the yacht, two appeared to be substantially larger - 4-5m long and dorsal fin much -taller and orca-like. I see there have been records of false killer whales in HK - perhaps these were some more ?
The last time I remember seeing non-pink dolphins in HK waters is more than 20 years ago, could there be a link betweeen the increase in cetaceans and the ban on trawling ?
Some of the crew tried to take photos without success - each appearance is so brief.