Less than two months after the removal of dams restored a free-flowing Klamath River, salmon have made their way upstream to begin spawning and have been spotted in Oregon for the first time in more than a century.

Fish and Game issued sport and commercial closures for coho fishing beginning in late summer across the entire Susitna River drainage, northern Cook Inlet and Anchorage. There were also restrictions placed on Kenai Peninsula rivers and streams including the Kenai, Kasilof and the lower Cook Inlet systems. Just last week, on the Kenai River, managers removed the option of sport fishing with bait and reduced the bag limit to one coho.

A new plant species is establishing itself in the area and impacting native beach greens.

CBC Radio’s What on Earth travelled to Yukon this summer to explore how a warming climate has threatened chinook salmon, endangering not just the species but a cultural keystone for some Indigenous communities.

"Grayling guts with unknown pearl like cyst or tapeworm. Never seen this before in our grayling."

With a bleak salmon return this year in Northwest Alaska, a lifelong fisherman reflects on a season marked by empty nets and big questions.

Orcas are starting to show new feeding behaviors around large trawler nets. They’re trying to steal fish caught in nets that are typically being hauled back. Scientists aren’t sure why orcas are doing this, but it’s dangerous for them because it increases their chances of getting caught in the net and dying.The problem is so bad that some fishermen have decided to skip fishing for black cod this year.

Researchers are puzzled by an increase in salmon shark sightings near Kodiak, with unclear links to king salmon declines and insufficient data on shark populations and movements.

Officials with the Yukon government say dozens of dead fish found earlier this week in a creek near Victoria Gold's Eagle mine were likely killed by a discharge of contaminated water from the mine site.

Skippers in Prince William Sound and Kodiak say this year's pink harvest is one of the worst they’ve ever seen. “I wake up every morning and I try to apply for a different job," one said.

After experiencing an unprecedented closure of subsistence salmon fishing, the Port Clarence district, including Teller and Brevig Mission, is now open for fishing.

From the images shared, these appear to be Philemona, a freshwater parasite. Philomena is a food quality concern but is Not considered a human health concern. With proper preparation, the salmon is safe to eat.

Ship Creek in Anchorage will be closed to sport fishing for two weeks to support salmon stock sustainability at a local hatchery.

These eggs from a trout caught in the Fish River, had unusual milky translucent capsules in it.

Cold spring and summer affected the results of salmon production in the district. Fishermen in the region caught more than three tons of salmon - this is several times less than in previous years, according to IA "Chukotka".

Sawfish, and about 30 other species of fish, are turning up sick and dying in the Lower Keys as questions mount over what's causing it.

The sardines and some mackerel washed ashore in Hakodate on Japan’s northernmost main island of Hokkaido on Thursday morning, creating a sliver blanket along a stretch of beach about a kilometer (0.6 mile) long. Takashi Fujioka, a Hakodate Fisheries Research Institute said the fish may have been chased by larger fish, become exhausted due to a lack of oxygen while moving in a densely packed school, and were washed up by the waves.

An unprecedented outbreak of sea lice in Tálknafjörður has led to the loss, or the need to dispose of, at least one million salmon. “Nobody has seen anything like this before. There is a Norwegian veterinarian who has been working in Iceland because of this and he has never seen anything like this in his 30-year career,” Karl Steinar observed.

Erratic temperatures led to the absence of tomcods, severely affecting local fishing.