Saving Seafood

Marine heatwave could combine with El Niño in Alaska this summer

May 19, 2026 — Marine heatwaves can wreak all sorts of havoc in Alaska: last year, a marine heatwave in the North Pacific ocean fueled Typhoon Halong, which devastated Alaskan communities. This summer there could be an extra hiccup: a strong El Niño event is likely according to the World Meteorological Organization, which could make the effects of a heatwave even worse.

El Niño events happen as a result of slower trade winds along the equator, which slows down the upwelling of cold water from deep in the ocean and causes overall warmer water conditions.

“We’re expecting a massive El Niño this year,” said Alaska Fisheries Science Center Director Bob Foy during a commercial fisheries trade show in Kodiak on April 16. “And it’s going to be larger than usual, it’s going to make its way to Alaska, we’ll probably see the effects of it this summer.”

The El Niño event could hit as another marine heatwave is brewing. Marine heatwaves happen when the temperature of the ocean is 4-5 degrees Fahrenheit higher than the baseline average for that area. According to research from the University of Alaska, Fairbanks, temperatures in the Gulf of Alaska have been generally trending upwards over the past fifty years, with an average increase of around 0.2 degrees C per decade. But marine heatwaves across the Pacific have hit even higher temperatures, and have become more frequent since the mid 2010s.

Read the full article at KMXT

What’s a ‘super El Niño’? And other El Niño questions, answered

May 18, 2026 — The odds are in El Niño’s favor right now.

This natural weather phenomenon, part of the El Niño-Southern Oscillation, or ENSO, occurs when warmer-than-average water extends throughout most of the equatorial Pacific Ocean just below the surface. That’s happening now. And powerful bursts of westerly wind have pushed immense amounts of warm water eastward, toward the Niño3.4 region where sea surface temperature, along with other atmospheric conditions, is used to assess the state of ENSO.

On May 14, in its monthly ENSO outlook, the NOAA/National Weather Service Climate Prediction Center gave an 82% chance that El Niño will be in place for the period May through July, which implies that it’ll be here within weeks.

How do experts know when El Niño has arrived?

El Niño conditions are declared when the atmosphere and ocean are in sync and the Niño3.4 sea surface temperature is at least 0.5 degrees Celsius (0.9°F) warmer than the seasonal average.

But just as hurricanes can and do stray from the “cone of uncertainty” at times, it’s vital to remember that El Niño can do much the same. Preparing for the prototypical outcomes is a smart move, as long as you keep in mind that forecasting the El Niño-Southern Oscillation is more a matter of probabilities than certainties.

NOAA now uses a Relative Oceanic Niño Index, or RONI, in which the Niño3.4 value is adjusted relative to the world’s tropical oceans as a whole; the goal is to keep global warming from smudging the signal of El Niño and La Niña events themselves.

Nearly all seasonal forecast ensembles used to predict ENSO at agencies around the world now concur that the imminent event is likely to bring Niño3.4 warming of at least 1.5°C, which would push it into the “strong” category. And some of the ensemble averages are now going well above 2°C, even for the adjusted RONI index. That would put it in the ballpark of the biggest El Niño events in the NOAA database going back to 1950.

Individual ensemble members still cover a fairly broad range, with outcomes varying from a weak event to a record-stomping one, but as shown below, they’re about as close to being unanimous on a significant El Niño as you’re likely to see. (This output is mainly using the traditional pre-RONI index, which tends to run slightly hotter on recent El Niño events.)

Read the full article at Yale Climate Connections

What is a ‘super El Niño’? Scientists predict record-breaking climate event this year

March 24, 2026 — The ever-shifting, interconnected system of global air and ocean currents dictates the weather we experience daily.

This year, however, scientists are warning that a particularly potent version of one of Earth’s most infamous climate phenomena, El Niño, could dramatically alter these patterns.

Climate scientist Daniel Swain recently posted on X (formerly Twitter), stating: “Whew. All signs are increasingly pointing to a significant, if not strong to very strong, El Niño event.”

This sentiment was echoed by Washington Post meteorologist Ben Noll, who cautioned that “changes in location, intensity and frequency of droughts, floods, heat waves and hurricanes are all likely.”

Read the full article at the Independent

West Coast Waters Experiencing Another Large Marine Heatwave

March 4, 2026 — A massive marine heatwave has dominated waters off the West Coast since last summer. This marks only the third time on record that such a large section of the coastal ocean has remained so warm for so long—particularly into winter months—without it being an El Niño, NOAA scientists report. NOAA Fisheries and our partners are tracking possible heatwave impacts, which can include harmful algal blooms that can sicken marine mammals and close shellfish fisheries.

Third Time as Warm

At one point last September, the current marine heatwave rivaled the enormous 2013–2016 marine heatwave known as “The Blob” in terms of size and surface temperatures. The current heatwave has raised the temperature of waters along the West Coast roughly 3 to 4 degrees Fahrenheit above normal. On September 9, 2025, the northeast Pacific reached its highest ever average temperature of 20.6 degrees Celsius, or about 69 degrees Fahrenheit. That’s almost a half-degree warmer than ever before. Past marine heatwaves shook up marine ecosystems that drove shifts of species, die-offs, and other disruptions of ecosystems in the Northeast Pacific Ocean.

“We have forecast tools that provide some insight, but we are also watching carefully for implications on the marine ecosystem,” said Andrew Leising, a research oceanographer at NOAA Fisheries’ Southwest Fisheries Science Center. He runs the California Current Marine Heatwave Tracker. The tracker has been documenting marine heatwaves off the West Coast through NOAA data from satellites, ships, and buoys since 2019.

The North Pacific has repeatedly hit record or near-record temperatures since The Blob. Like others before it, the current marine heatwave weakened and receded from the coast in October and November 2025. Unlike others, it has since strengthened and returned. “We’re in La Niña, but water temperatures along our coast look much different,” Leising said. “The conditions are hard to reconcile. We want to be cautious in our interpretation, but at the same time this is not a situation that we have seen before.”

Heatwaves Shift Species

The current heatwave has brought news of species in unusual areas, such as tunas caught in large numbers in Alaska last fall. The Blob and other marine heatwaves have been shown to reduce the survival of salmon in the ocean, leaving fewer fish to catch and to return to rivers to spawn. “We know these marine heatwaves alter ecosystem conditions, which affects fish and other marine life,” Leising said. “We’re very interested in what the fishing fleet and others who are out on the water are seeing and are looking into new ways to collect this information. Are there species in unusual places, or what might be changing?”

In addition, the unusual warmth could begin to set the stage for a repeat of last year’s harmful algal bloom off Southern California. It hit unusually early in 2025 and killed hundreds of California sea lions, dolphins, and seabirds. Harmful algal blooms can also close fisheries, especially recreational fisheries involving shellfish that concentrate the toxins, affecting the coastal economy.

Read the full article at NOAA Fisheries

Satellite data reveals 2023 was record-breaking for marine heatwaves — are we at a ‘climate tipping point?’

July 25, 2025 — A recent study that tapped into satellite data has revealed that 2023 marked an unprecedented year for marine heatwaves, with record-breaking levels of duration, reach and intensity observed across the world’s oceans.

The study’s scientists say tackling this growing climate threat will require better forecasting tools, smarter adaptation strategies, and faster action toward curbing climate change, which is primarily driven by human activities like burning coal for cheap power.

“The North Atlantic [marine heatwave], lasting 525 days, revealed the scale of persistent ocean warming,” wrote the research team in the paper published in the journal Science, “whereas the Southwest Pacific [heatwave] surpassed previous records with its extensive spatial coverage and prolonged persistence. In the Tropical Eastern Pacific, [marine heatwaves] peaked at 1.63°C during El Niño development, and the North Pacific sustained an ongoing anomaly over 4 years.”

Read the full article at Space.com

IFFO Members’ Meeting: Industry recovers from El Niño, charts future with byproducts and diversification

June 2, 2025 — IFFO’s Members’ Meeting, held in Madrid from May 13-14, 2025, brought together a record 267 delegates from 36 countries. This year, the main highlight was the industry’s recovery following the El Niño event.

During the meeting, Enrico Bachis, market research director at IFFO, presented 2025 projections for fishmeal and fish oil: 5.6 million tons of fishmeal and 1.2-1.3 million tons of fish oil. With Peruvian production recovering and other global producers maintaining stable levels, fishmeal and fish oil production are expected to remain consistent in 2025.

However, El Niño impacted more than just production levels, it also drove structural change in the industry. “This year, we saw Cooke acquiring Copeinca, and Centinela was acquired by Exalmar. Last year, another Peruvian company was also sold. Some companies are better positioned to withstand fishing bans, so after El Niño, we are seeing consolidation in the industry,” Bachis said.

Read the full article at Aquafeed.com

El Niño Yields to Upwelling in the California Current, Renewing Productivity of West Coast Ecosystem

March 10, 2025 — According to the NOAA California Current Integrated Ecosystem Assessment’s annual report, the California Current Ecosystem pulled out of a strong El Niño pattern in 2024. That El Niño delayed the onset of the annual spring upwelling of nutrient-laden water that, was nevertheless strong enough to fuel the rich West Coast ecosystem and improv environmental conditions  for salmon.

NOAA Fisheries scientists presented the report to the Pacific Fishery Management Council to inform upcoming decisions on fishing seasons. The report provides a snapshot of ocean conditions, fish population abundance and habitat, and fisheries landings and fishing communities’ conditions. It gives short-term forecasts and longer term projections of how conditions across the ecosystem may evolve in 2025 and beyond.

Report Highlights

  • Upwelling resumed even more strongly and consistently than normal, supplying a greater influx of nutrient-rich waters that improved forage conditions for many species
  • Productive waters supported abundant forage speciessuch as anchovy and krill and strong production of young hake and juvenile rockfish that could contribute to commercial fisheries in future years
  • Improved freshwater streamflows should support survival of juvenile salmon migrating downstream in California to the ocean
  • California sea lions found enough prey amid the El Niño warming, while experiencing harmful algal blooms that led to premature birth of pups and strandings along the coast

“Each year we learn more about how this marine ecosystem functions and what we should be watching to anticipate change,” said Andrew Leising, a research oceanographer at NOAA Fisheries’ Southwest Fisheries Science Center who coauthored the new report. “We’re getting better at forecasting what is coming at us, at the same time we see some new twists.”

Read the full article at NOAA Fisheries

La Niña may end soon. What that may mean for temperatures and hurricanes.

March 8, 2025 — A long-awaited La Niña finally arrived in the Pacific Ocean in January. But less than two months later, the picture is rapidly shifting.

The World Meteorological Organization announced Thursday that the ongoing La Niña event is expected to be short-lived and that there is a 60 percent chance it will fade by May.

The pattern is the foil of the better-known El Niño and is typically known for cooling a vast swath of the Pacific Ocean. But the phenomenon has done little to break the cycle of excessive global heat that dominated during 2024 and has continued into 2025 — except in the United States. And now, signs are emerging that could spell a coming end to the pattern, raising questions about what could come next — including whether yet another record-warm year for the planet could be in the cards.

Meanwhile, a new and unexpected pattern of warming oceans in the eastern Pacific, west of South America, has sent sea temperatures soaring to more than 5 degrees above average. Called a coastal El Niño, or El Niño Costero, the pattern can affect weather near and far. Coastal El Niño events in 2017 and 2023 caused flooding rains and high rates of dengue fever in Peru.

Read the full article at The Washington Post

Hoping to protect turtles, feds announce limited fishing restrictions off West Coast

June 2, 2024 — In an effort to protect endangered loggerhead sea turtles, the National Marine Fisheries Service announced on Thursday that fishing with large-mesh drift gillnets will be prohibited in federal waters off the coast of Southern California from the beginning of June until the end of August.

The announcement was made after officials determined that El Niño weather conditions are happening in Southern California.

El Niño causes a variety of weather effects across the United States — including warmer water in the Pacific and in turn less phytoplankton for fish to eat, disrupting the food chain of sea creatures that eat those fish.

Large-mesh drift gillnets are sometimes miles-long nets used to catch fish like swordfish. They can inadvertently catch other sea creatures like whales, dolphins, sharks and turtles.

Read the full article at Courthouse News Service

Annual ocean conference raises $11.3b in pledges for marine conservation

April 20, 2024 — From April 15-17, state delegates, organization representatives, academics and philanthropists met at the 9th Our Ocean Conference (OOC) in Athens to discuss the protection of the world’s oceans and pledge actions to safeguard their future.

As the OOC took place, news broke about the world’s coral reefs undergoing a mass bleaching event, which lent a sense of urgency to the conference. Experts say this global bleaching event is a result of the current El Niño climate pattern as well as the ongoing rise in global ocean temperatures due to human-induced climate change.

“Devastating but also predictable,” is how Melissa Wright, a senior member of the environment team at Bloomberg Philanthropies, which funds ocean conservation work, described the bleaching event at the conference’s opening press briefing. She urged leaders to take “decisive action” on climate change as well as other threats such as overfishing, pollution and development.

Read the full article at Mongabay