Every year the Natural History Museum in London hosts the Wildlife Photographer of the Year Exhibition and you can even vote for the People’s Choice Award on their website.
I don’t want to sway your opinion but there are two images of marine animals that also occur in Hong Kong:

‘Baracuda Swirl’ by my friend Alex Mustard (UK)

&

‘Big Mouth’ by Adriana Basques (Brazil) – a great shot of a whale shark close up.

Now, go and vote!