Scientists film sperm whale 'doing laps' of underwater camera
A sperm whale surprised scientists carrying out research in the Gulf of Mexico on Tuesday.
The whale was filmed by the scientists' robotic submarine, almost 600 metres below the surface.
Sperm whales are endangered and said to be curious and very intelligent.
This particular creature came so close that scars on its nose - possibly from a boat's propellers - were visible.
18 Apr 2015
- From the section World