If a kid catches a big walleye on the St. Louis River estuary in Duluth, the state warns her not to eat it. Ever.

"Scientists led by researchers with the U.S. Geological Survey have found an elevated number of cases of skin and liver tumors in white suckers in the Milwaukee, Menomonee and Kinnickinnic rivers — a discovery that suggests more work will be needed to remove contaminants from the waterways."

"In an unprecedented move, Montana Fish, Wildlife and Parks is closing 183 miles of the Yellowstone River from Gardiner to Laurel to all water-based recreation — fishing, wading, floating, tubing, boating."

"Teamwork from Maryland environmentalists — from elementary schoolers to nonprofit workers — could result in new oyster habitat, and consequently cleaner water, for the Chesapeake Bay. Maryland Coastal Conservation Association members and partners dumped 70 concrete reef balls into the bay on Thursday, the first deployment for the organization's Living Reef Action Campaign."

"The folks who write POLITICO’S Agriculture Tip Sheet were celebrating an anniversary Tuesday. Not their own, but the one-year anniversary of USDA’s proposed organic aquaculture standards being hung up in the Office of Management and Budget (OMB) at the White House."

"Rising global temperatures are clearly linked to increasing waterborne food poisoning, particularly from eating raw oysters, along with other nasty infections, a new study shows."

"Maryland’s ravaged Chesapeake Bay oyster population shows signs of revival inside the state-created sanctuaries that have been off-limits to harvesting for the past decade, according to a report from the Department of Natural Resources."

"The Chinook salmon that Randy Settler and other Yakama tribal fishermen are pulling from the Columbia River are large and plentiful this summer, part of one of the biggest spawning runs since the 1960s. It is a sign, they say, of the river’s revitalization, through pollution regulations and ambitious fish hatchery programs. But barely four miles upstream from the fishermen’s nets, state workers are still cleaning up after a major oil train derailment in June."

"Times are tough for Chesapeake oysters. For one thing, they used to be bigger. "If you look at what people were saying back in the 1600s and 1700s about oysters, people had to cut them in half before they could even eat them," says Denise Breitburg, an ecologist with the Smithsonian Environmental Research Center."

"There was a time when Sandra Gologergen's freezer never ran out. Packed with traditional Inuit foods like whale, walrus, seal and fish, her freezer has been an essential lifeline, ensuring her husband, three kids and grandson make it through the long harsh winters of Savoonga, Alaska. 'Then that changed,' she says."