Disney's Sebastian the crab was a strong believer that life below the waves trumps a terrestrial existence (the Caribbean crustacean even put on an extravagant musical number to prove his dedication to aquatic life). After browsing through the winning entries in this year's Underwater Photographer of the Year competition, we're starting to think Sebastian might be have been onto something. From migrating mobula rays to feasting sharks (and even a rare appearance from an otter), we've rounded up our favourite photos from the 2018 competition. So sit back, relax and prepare to be wowed.





















