As stocks of many fish species in the oceans are reduced or depleted by overfishing, aquaculture is increasing rapidly worldwide as a way of filling the gap. But that growth has been accompanies by serious environmental costs.

"For over 75 years, Blau Oyster Co. has relied on Washington state's cool clean waters to grow the plump oysters that are as prized in the Northwest as salmon and orcas. But too much pollution from animal and human waste has been washing into Samish Bay in north Puget Sound, prohibiting shellfish harvests 38 days already this year."

"Small fish living in a region of the Pacific Ocean where floating trash collects in a huge, slowly swirling bowl eat as much as 24,000 tons of plastic waste each year, scientists have found."

"The Pennsylvania Fish & Boat Commission said it plans to lease portions of its 43,000 acres of waterways for natural gas exploration to generate money to rebuild more than a dozen dams that are in danger of collapse."

"Five out of the eight tuna species are at risk of extinction, conservationists warned today, as they called for urgent action to tackle over-fishing."

"Tons of imported fish laced with chemicals banned from the U.S. food supply, including carcinogens, are routinely showing up in this country and, state officials say, winding up on American dinner plates."

"Scripps scientists find plastic in 9.2% of lanternfish collected. The small fish are commonly eaten by larger species, and the plastic could end up in the food chain."

"The House voted Wednesday to prohibit the Food and Drug Administration from approving genetically modified salmon for human consumption."