"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.

"STONINGTON, Me. — Lobsters are flooding the market here. A combination of warm weather and good conservation techniques has led to what could end up being a record lobster harvest across Maine waters."

"Thousands of people consume fish from Washington, D.C.’s highly polluted Anacostia River, despite safety warnings."

"For salmon trying to make it upriver to spawn before a hot summer hits, slow and steady loses the evolutionary race. Salmon DNA records stretching back over 30 years show that nature has increasingly selected for fish that migrate from the ocean earlier in the year. It is among the first pieces of genetic evidence that climate change is driving the evolution of a species."

"A disturbing nationwide decline in oysters and the life-giving reefs that they build is particularly dramatic in California, where the once-abundant native species has been virtually wiped out, according to a recent scientific study."

"Humane Society International called it a 'monumental decision' and a 'watershed moment for the global movement to protect sharks.' The conservation group Shark Savers said it 'could be the best news for the oceans in some time.' The major development? The Chinese government announced Tuesday that it would ban the serving of shark fin soup, a prized and expensive delicacy, at official banquets."

"Sockeye salmon -- great table fare, but not good biters on sport gear -- are streaming up the Columbia River in massive numbers and appear likely to be a record return this year."

"Last month a virus broke out in several open water salmon farms in British Columbia that has the region’s fish farm owners scrambling to mitigate their losses."

"Within the next few decades, ocean acidification – an effect of global warming – could leave sea creatures along the West Coast unable to maintain their protective shells, according to a new study."