The Ocean’s Low-Oxygen Dead Zones Are Getting Worse

Along the West Coast, low-oxygen levels in bottom layers of the ocean, known as hypoxia, have become a big concern for scientists and fishers alike—fish and crabs are vital to ecosystems, research, and an entire industry. “We’re always on the lookout to see, is this going to be a bad year?” says Francis Chan, a marine ecologist at Oregon State University who studies the effects of ocean chemistry. And by all accounts, 2017 shaped up to be a bad year. Scientists first got reports of crabs dying in pots off the Oregon coast back in 2002. Since then, says Chan, there have been some years when the oxygen levels in some places drop to zero and stay that way for weeks or even months.  Video, click here to read the story 17:16