Flycatchers, swallows and warblers are among the species “in a mass die-off across New Mexico, Colorado, Texas, Arizona and farther north into Nebraska.

About 189,000 fall chum had entered the Yukon River as of Sept. 7. At least 300,000 fish must enter the river before either Alaska or Yukon fishers can begin harvesting.

The Government of Nunavut is restricting harvest due to what it calls “a recent steep decline in the population” of the herd. That decline has led to a “conservation concern” about the western Nunavut herd’s numbers.

“For the killer whales, I honestly don’t know if this is normal or not,” said Mandy Keogh, the Regional Marine Mammal Stranding Coordinator for NOAA Fisheries in Alaska. Dead killer whales simply aren’t seen that often.

Blooms are often associated with low dissolved oxygen events and warm ocean water temperatures and weather changes – all of which we are, or have been, experiencing," said Kiemele. Farm owner Cermaq says it has deployed fish protection countermeasures that have already caused conditions to improve.

A blob menacing Hawaii is now visible from space. A massive heatwave in the Pacific Ocean is killing off coral. Satellites are capturing the destruction so that scientists can learn how to rebuild the reefs.

As the Cape nears the start of sea turtle stranding season there is another long-distance migrant that researchers have spotted coming ashore in record numbers this year, Ocean sunfish.

Dead humpack whale found between Port Graham and Seldovia.

One short section of the river that last year at Thanksgiving had more than 100 fish in it, this year on the same weekend had less than 20.

Bull trout, which are technically char, mostly inhabit cold and pristine snow-melt-fed waters. Changes in water quality and temperatures challenge the future for this species in Alberta.

New aerial footage appears to show thousands of dead fish at Lake Pamamaroo in the Menindee Lakes System, near Broken Hill, nine months after a mass fish kill event on the nearby banks of the Darling River.

It was hoped the whale would find its way out without help, as it did not initially appear to be in any distress.

With hibernation fast approaching, a grizzly bear family is spotted searching for fish near the shores of Canada's Knight Inlet. They're emaciated, and wildlife observers worry might not make it through winter. The heartbreaking images highlight another victim of the climate crisis and the depleted salmon population.

Northern Harvest Sea Farms is busy cleaning pens of dead salmon, and the province's head aquaculture vet says higher-than-average water temperatures are to blame.

Along with significant seabird die-offs near Port Heiden, there have been reports of small whales and porpoises, walrus and sea otters washed up on shore.

KIHEI — Called a “rare” occurrence that hasn’t happened in 40 to 50 years, the second mass stranding of pygmy killer whales at the same South Maui beach

Staff from the governor's office responded and found two bulls entangled on the shore. One lay dead in the water, and another could not move. A third bull had managed to get loose.

The number of chinook salmon that reached the Whitehorse fish ladder this year hit a 40-year low, and it's not clear why. Just 282 chinook passed through the fish ladder this year, compared to 690 last year. "We did see some large pre-spawn mortality die-offs in a tributary of the Yukon River — the Koyukuk in Alaska. This was for summer chum, and not chinook — but we expect that that higher water temperature also affected the chinook migrating through."

62 pilot whales swam onto the shore at Ytra Lón on the Langanes peninsula, northeast Iceland, on Friday evening. All died.