"On the fishing-boat piers of New England, nearly everyone knows a fisherman who was lost at sea."

"A floating robot has been deployed to track great white sharks in the Pacific as part of efforts to understand the giant predators."

"A Canadian company's surprise proposal to build a hydroelectric generation facility on the Yuba River has raised alarm among government agencies and nonprofits working to restore salmon runs on the river."

"A petition by environmentalists notes that young sharks are frequently caught in gill nets. There are about 340 mature great whites in the northeast Pacific, researchers say."

"CHICAGO -- At Ming Hin Cuisine in Chicago's Chinatown, a giant shark fin decorates the wall in the main dining room, and shark fin soup is offered on the banquet menu for customers willing to pay the price."

"SACRAMENTO, Calif. — Most of the salmon caught in California come from hatcheries in the Sacramento Valley, yet it turns out not much is known about these fish even though they are bred by hand."

"LINCOLN, Neb. -- Thousands of fish are dying in the Midwest as the hot, dry summer dries up rivers and causes water temperatures to climb in some spots to nearly 100 degrees."

Lake Ontario's lake trout have been a key indicator of pollution that affects humans and other species.