Chinook make their way up the Klamath River every year, but fewer and fewer arrive in the spring.

Various concerned groups have been petitioning NOAA Fisheries to list spring-run Chinook salmon in Oregon and Northern California for over a decade.

The decrease in growth appears to be associated with increasing water temperatures, affecting animals throughout the marine food web.

A recent sampling from two California streams found nearly all juvenile salmon were infected with deadly parasites, and conditions are expected to worsen.

New genomic analyses reveal that piscine orthoreovirus first came to the Pacific in 1989, around the same time that salmon farms in the area started importing Atlantic salmon eggs from Europe.

Feeding the world’s insatiable appetite for wood products is sacrificing the future of a crucial ecosystem.

Stephen Raverty of the Ministry of Agriculture in Canada and Joseph Gaydos of UC Davis speak with The Scientist about their recent study assessing the causes of orca deaths.

6PPD, a tire preservative, reacts with ozone to produce a compound that the researchers say may be responsible for large die-off events.

The fast-growing fish can now be raised and sold in the US, although it’s likely to be some time before the product hits the market.

The variation may help explain why stocked salmon don’t fare as well in the ocean.

Organophosphates jeopardize dozens of species, a federal review finds.

A fish farm blamed the “exceptionally high tides” resulting from yesterday’s solar eclipse for net failure. Authorities have authorized limitless takes of the invaders.

Intensive aquaculture favors increasingly virulent forms of certain fish-infecting parasites and pathogens, studies show.

Federal regulators OK the genetically modified fish for sale as food.

AquaBounty Technologies’s fast-growing fish is the first genetically modified animal approved by the US Food and Drug Administration.

Sound risk management concerning genetically engineered food animals is critical. 

On the potential benefits and risks of genetically modified fish entering the marketplace 

An increasingly common algal growth, found in rivers the world over, is caused by changing environmental conditions, not accidental introductions.