Unique because it's all underwater.
I was alerted to this contest by this Daily Mail article:
Pictures that really did make a splash: The mesmerising winners of the Underwater Photographer of the Year awards revealed
Here's the actual Web site for the contest winners:
2017 Underwater Photographer of the Year Results and Winners
This has lots and lots and lots of great underwater pictures.
Here's two that I liked.
|Whale shark feeding on plankton at night|