The world under water is as mysterious to many of us as the Moon and the stars, but intrepid underwater photographers are braving the deep to capture stunning, captivating and extraordinary images of life under the waves. The annual Underwater Photographer of the Year competition celebrates the best of these pictures, and the UPY2018 is one of the best collections yet.

Here are the first, second and third place images in each of the categories but you can see the full set of winners, runners-up and highly commended underwater photos at underwaterphotographeroftheyear.com.

All images © UPY2018

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