Mysterious ghost shark caught on film for the first time

Also known as chimaeras, the creatures have tooth plates instead of teeth and a retractable penis on their heads

American scientists surveying the depths of the ocean off the coast of California and Hawaii have unwittingly filmed the mysterious ghost shark for the first time.

The team from the Monterey Bay Aquarium Research Center had sent a remote operated vehicle down to depths of 2,000 metres (6,700ft) when the creature appeared on their screens.