Rolex’s Perpetual Planet initiative has partnered with CNN to drive awareness and education around key sustainability issues and to inspire positive action. The marine biologist and amateur photographer captured the photo on a blackwater dive – a night dive in the open ocean, which uses floodlights to attract the ocean nightlife. Thousands of entrants submitted underwater and coastal images, as well as pictures captured by drone, to the competition, organizers said. From world-class drone images of megafauna to breath-taking underwater images of deep-dwelling ocean wildlife, the full spectrum of ocean life is brought to life like never before. A selection of the winning and highly commended images can be seen in the gallery above.

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Persons: Jialing Cai, Will Harrison, Blancpain Organizations: CNN, Oceanographic Magazine, Tourism Western, Australian National Maritime Museum Locations: Philippines, Arksen, Tourism Western Australia, Sydney