Even worse than an oil spill?

"Commercial fish catch has declined by 500,000 tons per year since 1988, not for lack of effort, money or technology — in fact because of those factors — but for lack of fish. The danger becomes dual, says Danson: “If you’re overfishing at the top of the food chain, and acidifying the ocean at the bottom, you’re creating a squeeze that could conceivably collapse the whole system.” Good article here