Hypoxia: dead zones
A closer look at dead zones
Mystery of dead zones revealed
Ocean dead zones: a global problem
The global spread of ocean dead zones
NASA: discovering dead zones in the oceans and lakes
The equatorial undercurrent and the Oxygen Minimum Zone in the Pacific
A decline in dead zones: study shows efforts to heal Chesapeake Bay are working
Diverging fates of the Pacific Ocean oxygen minimum zone and its core in a warming world