Marine biologists were able to capture pictures of pilot whales after being given permission to dive the Strait of Gibraltar. The small channel of water, which is busy with huge cargo ships entering and leaving the Mediterranean, is rarely dived but Rory Moore, 28, a British marine biologist, and his fellow free-divers were granted permits.
Mr Moore, from Crickhowell, Wales, said: "Some of the whales came up to the camera and started to blow bubbles and 'bark' loudly. It was an amazing thing to witness but it was actually a clear sign to keep our distance.
"There are risks, but the opportunity to see these creatures up close was a dream come true."
Pilot whales are found between South America, South Africa and Australasia, and further north between North America and Europe.