Saving Seafood

NOAA scientists set sail on landmark West Coast Ocean Acidification survey

July 21, 2026 — The following was released by the Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration:

On July 20, 2026, researchers embarked on the NOAA Ocean Acidification Program’s West Coast Ocean Acidification mission (WCOA 2026). Departing from San Diego aboard the University of Alaska, Fairbanks (R/V) Sikuliaq, the team will travel north to Washington, adding important new observations to NOAA’s long-term monitoring of ocean acidification and its impacts on marine resources.

WCOA 2026 will couple ocean chemistry, biology, and physics to build a more comprehensive view of how extreme events impact biogeochemistry and ecosystems.

“Results from past WCOA cruises have provided novel insights into acidification rates and impacts in coastal and estuary habitats that provide our nation with rich fish and shellfish resources,” said Dr. Simone Alin, Supervisory Oceanographer, NOAA/PMEL. Resource managers and harvesters can use this information to inform fisheries management decisions.

This intensive 30-day coastal research cruise aboard the 261-foot research vessel offers scientists a unique opportunity of sampling during an El Niño that is on track to become one of the strongest on record. El Niño brings warmer water and can alter upwelling and precipitation patterns in the region. Phytoplankton and zooplankton communities will follow these warmer waters, which impacts food webs and fisheries as seen during past marine heatwaves.

Two days after the Sikuliaq departs, the PMEL SeaTrac will head south from Washington to collect added coastal measurements during peak ocean acidification and hypoxia season and pick up any El Niño signal that may have made to the northern California Current System this summer. These OA cruises provide critical high-quality data for the U.S. Coastal Large Marine Ecosystems, and are essential for modeling and forecasting changes in ocean acidification and hypoxia to better prepare for future impacts to valued fisheries and ecosystems.

Led by researchers at the University of Washington’s Cooperative Institute for Climate, Ocean, & Ecosystem Studies and PMEL, researchers will collect high-quality ocean chemistry data, phytoplankton, zooplankton, and other observations. Scientists will also collect environmental DNA, which can reveal the diversity and abundance of ocean life in different ocean conditions.

Data collected during WCOA 2026 are essential for validating models and forecasts of ocean conditions like J-SCOPE. This short term (six to nine month) forecast is used for the California Current Integrated Ecosystem Assessment. High quality ocean carbon chemistry data is required to forecast the saturation state of calcium carbonate, the mineral building block used by shellfish like Dungeness crabs, clams, and oysters.

Other coordinated regular coastal fisheries surveys, including the California Cooperative Oceanic Fisheries Investigations (CalCOFI) enhance the impact of WCOA 2026. By conducting biological net tows at established stations, researchers will gain high-quality data on marine life.

Ultimately, the data collected through WCOA 2026 will serve as a foundational benchmark for monitoring, modeling and research in the region. These data will provide calibration information for sensor networks designed to fill measurement gaps between research cruises. With the potential for sampling to occur as ocean conditions change with El Niño, NOAA and our partners will be able to better understand how extreme conditions alter vital marine resources like Dungeness crabs, krill, plankton and other fisheries.

Catching Crabs in a Suffocating Sea

March 7, 2022 — The crab pots are piled high at the fishing docks in Newport, Oregon. Stacks of tire-sized cages fill the parking lot, festooned with colorful buoys and grimy ropes. By this time in July, most commercial fishers have called it a year for Dungeness crab. But not Dave Bailey, the skipper of the 14-meter Morningstar II. The season won’t end for another month, and “demand for fresh, live crab never stops,” Bailey says with a squinting smile and fading Midwestern accent.

Most marine animals don’t breathe air, but they need oxygen to live, absorbing it from the water as they swim, burrow, or cling to the seafloor. But lately, bouts of dangerously low oxygen levels—or hypoxia—have afflicted parts of the North American west coast, affecting critters from halibut to sea stars. These “dead zones” cause ecological disruption and economic pain for fishers like Bailey, who can’t sell crabs that have suffocated in their traps.

The phenomenon offers a preview of what climate change holds for many other parts of Earth’s oceans, which are already stressed by human impacts. As seawater warms, it holds less oxygen. Warmer surface water also acts like a cap that prevents the gas from mixing from the atmosphere down into the deep. And rising air temperatures can shift weather patterns in ways that worsen the problem.

It’s a subtle but significant change. While well-oxygenated water contains about eight milligrams of oxygen per liter, hypoxic water holds less than two and can sometimes approach zero. Overall, the world’s oceans have lost up to two percent of their total oxygen content over the last 50 years, and scientists estimate that they could lose another two to four percent over the next century. By 2100, some amount of climate-related oxygen loss could affect more than three-quarters of the ocean’s area, inflicting widespread damage to marine ecosystems and the billions of people who depend on them.

Read the full story at Hakai Magazine

Low oxygen levels along Pacific Northwest coast a ‘silent’ climate change crisis

September 29, 2021 — Nearly two decades ago, fishers discovered an odd occurrence off the coast of Oregon. They were pulling up pots of dead or lethargic crabs.

At first they suspected a chemical spill or a red tide. But instead, they learned, dangerously low levels of dissolved oxygen in the ocean water were to blame.

The crabs had suffocated.

These swaths of hypoxic areas have surfaced every summer on Pacific Northwest shores since it was first recorded in 2002. They are spurred by naturally occurring coastal upwellings and algae blooms, exacerbated by climate change, said Francis Chan, director of the Cooperative Institute for Marine Resources Studies at Oregon State University.

Akin to fire season, hypoxia season arrived earlier this year – the earliest start in 20 years, according to Chan. But unlike wildfire, or other visible climate emergencies, it’s gone largely unrecognized.

“It’s kind of a silent problem happening out there,” said Chan. “This year, I can look out and see trees with one side burnt because of the heat wave. As I’m driving on McKenzie highway, I can see Mount Jefferson has no snow on it. But when you drive out to the ocean, it looks exactly the same as last summer.”

Read the full story at the Spokesman-Review