Choke

Large regions of the open ocean are being starved of oxygen because of warmer sea temperature...

“The vertical distribution of deep-ocean species is shifted upwards. They have to move to avoid the low-oxygen waters. At the same time, the surface waters are getting warmer and more acidic and creating less suitable habitat from above,” [says Lisa Levin of the Scripps Institution of Oceanography].

“The appropriate habitat for many ocean animals is being compressed causing many animals to live in a smaller area at higher densities in waters that may be shallower than normal.

“This changes their interactions with other species, with predators and competitors and it also makes them much easier targets for fishermen.”

-- report.