South Pacific captured some incredible imagery for the series.
There are as many species of coral in deep sea reefs as in their warm water counterparts.
The seas around Sulawesi contain some wonderfully creepy wildlife.
Up and down the coastline, Nigel Marven meets whale-watchers, scientists and researchers.
Sir David Attenborough's seminal ocean classic.
Simon Reeves voyage of discovery takes in the natural as well as the human world.
Trevor Hutton is self-trained but South Africa has always cautioned against the sport.
One of the most wide-spread mammals on the planet, they inhabit every ocean.
See all kinds of underwater life with these pictures of fish and sea creatures.
Photos taken from the Reef to Rainforest episode of Great Barrier Reef.
What lies at the bottom of the oceans? What would happen if the planet lost them?
