Sea floor covered in oil and dead marine organisms
Media playback is unsupported on your device

Submersible finds Gulf spill oil and dead animals

21 February 2011 Last updated at 05:28 GMT

The 2010 Gulf of Mexico oil spill "devastated" life on and near the seafloor, a marine scientist has said.

Studies using a submersible have uncovered a layer of dead animals and oil up to 10cm thick in places.