Sperm whales sleeping, and possibly dreaming, is an unusual sight to see.
Diver Pulls a Giant Fishhook Out of Lemon Shark
We hope all divers are as helpful as this one who removed a huge hook from a lemon shark's belly.
South African Humpback Whale Party
Huge groups of humpback whales are being seen in South Africa - something only seen in recent years.
A Virgin Start-Up-backed company, ARC Marine, is creating an artificial reef at premier U.K. dive site Vobster Quay in 2017.
In the Scottish Highlands, a remote, sheltered stretch of water around the Orkney Islands is home to Scapa Flow, with some of the best dive sites in Britain.
The diving in Raja Ampat, Indonesia is world-class, sustainable and — perhaps surprisingly — can be quite affordable.