Being a slow swimmer, you'll find dugongs in sheltered lagoons and bays in warm water in the Indian and western Pacific Oceans, such as are found in the Red Sea, East Africa, the Philippines and Australia. In total they live in 48 countries, but in many places they are close to extinction. Dive . . .

The inadvertent discovery of sea life on a boulder beneath an Antarctic ice shelf challenges our understanding of how organisms can live in environments far from sunlight, according to a team of biologists.

Best of Show is a once-in-a-life-time moment where a curious octopus took a selfie of itself with the photographer's family.