The worlds largest oil skimmer:

 The 'A Whale' arrived in the Gulf on last Wednesday and has been awaiting approval to join in cleanup efforts.

The skimmer works by "taking in oily water through a series of vents, or jaws, on the side of the ship and then decanting the intake," Grantham said. "In many ways, the ship collects water like an actual whale and pumps internally like a human heart."