An international team looks back 12 million years for clues about the formation of these vast areas where no life can survive A satellite image of the Northern Gulf of Mexico, where 'dead zones' can ...

which rains down into the deeper ocean where it will be degraded,” creating what’s commonly called “dead zones,” or areas with oxygen too low to sustain most marine life, Treude said.

Scientists believe many of the life-forms that call this environment ... to reflect that the deep-sea mining zone is 16,400 feet beneath the Pacific Ocean’s surface.

It's the size of Florida. Dead zones are areas of the ocean with low oxygen that can no longer support marine life. It's caused by warming oceans and agricultural runoff. "The ocean is suffocating ...