WINNERS GALLERY

A rare encounter with a fever of cownose rays on the Ningaloo Reef, Western Australia.

A split shot image of the dense coral gardens of Coral Bay, Ningaloo Reef.

A reef manta ray filter feeding with a school of juvenile golden trevally in Batemans Bay, Ningaloo Reef, Western Australia.

Grey reef sharks hunt and chase a huge school of bait fish.

A freediver falls through an ocean full of moon jellyfish in Raja Ampat, West Papua.

A whale shark surrounded by a school of juvenile golden trevally on the Ningaloo Reef, Western Australia.

An uncommon sighting of a whale shark feeding on a large school of baitfish on the Ningaloo Reef, Western Australia.

The Papuan jellyfish, nicknamed the Golden Medusa, photographed at night in a jellyfish lake in Raja Ampat, West Papua.