North Atlantic: the stories behind the incredible marine-life footage

"One of the key messages of this three-part series is how we treat our oceans and its creatures - the documentary looks at everything from toxicity in whales from human activity in the ocean to the decimation of fin whales due to whaling."

Ken O’Sullivan filming a blue shark in the North Atlantic, off Ireland

Appropriately for a documentary series about water and marine life, there is a strong ripple-effect theme throughout North Atlantic — The Dark Ocean which is on TV now.

Underwater filmmaker and photographer, Ken O’Sullivan, from West Clare has spent years filming the iconic creatures and marine life of the North Atlantic.