Last year, a remotely operated vehicle (ROV) was checking out undersea piping 900 meters down in the Gulf of Mexico when a sperm whale swam up to
check out the robot.
Appin Scientific obtained the amazing video clip and posted it to a Marine Mammal Research and Conservation list.
The footage was taken at 900m from an ROV working in the Gulf of Mexico. It shows a sperm whale slowly investigating a sub sea pipe structure. Various
markings can be seen clearly on the animal including the tail flukes.