The 2020 Underwater Photographer of the Year contest (UPY) crowned its best photos. More than 5,500 images were submitted by over 500 participants from around the world and the judges have had a tough ...

To answer these you first need to know that long-finned pilot whales, harbor porpoises and other small toothed whales make sounds that enable them to 'see' under water. This is how they communicate ...