Organizers of the Underwater Photographer of the Year Contest have just announced the winning photographers and images for 2018, with German photographer Tobias Friedrich being named Underwater Photographer of the Year 2018. More than 5,000 images were submitted this year by photographers from around the world. Prizes and commendations were handed out in a number of categories including Wide Angle, Macro, Wrecks, Behavior, Portrait, Black & White, Compact, Up & Coming, and, in British waters, Wide Angle, Compact, and Macro shots. UPY was once again kind enough to share some of this year's honorees with us below, with captions written by the photographers.