Following the incredible journey of a female humpback whale and her calf.
Filming in water can be challenging, but Nigel Marven has got some hints and tips for you!
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.
A world of wildlife beneath the waves.
Exploring the deep blue sea's weird, wonderful and creepy inhabitants.
The seas around Sulawesi contain some wonderfully creepy wildlife.
Nigel Marven sets out on another adventure, this time focusing on grey whales.
Up and down the coastline, Nigel Marven meets whale-watchers, scientists and researchers.