Saving Seafood

Deep-sea mining risks disrupting the marine food web, study warns

November 6, 2025 — Drilling for minerals deep in the ocean could have immense consequences for the tiny animals at the core of the vast marine food web — and ultimately affect fisheries and the food we find on our plates, according to a new study.

Deep-sea mining means drilling the seafloor for “polymetallic nodules” loaded with critical minerals including copper, iron, zinc and more. While not yet commercialized, nations are pursuing deep-sea operations amid rising demand for these minerals in electric vehicles and other parts of the energy transition, as well as for technology and military use.

The researchers examined water and waste gathered from a deep-sea mining trial in 2022.

What the study discovered

University of Hawaii researchers studied an area of the Pacific Ocean called the “twilight zone,” about 650-5,000 feet (200-1,500 meters) below sea level. Their peer-reviewed findings, published Thursday in the Nature Communications scientific journal, say mining waste could affect anything from tiny shrimp smaller than .08 inches (2 millimeters) long to fish 2 inches (5 centimeters) long.

That’s because, after mining companies bring the mineral-rich nodules up to the surface, they have to release excess sea water, ocean floor dirt and sediment back into the ocean. That creates a murky plume of particles about the same size as the naturally occurring food particles normally eaten by the zooplankton that swim at that depth.

Read the full article at the Associated Press

NASA Data Helps Map Tiny Plankton That Feed Giant Right Whales

May 7, 2025 — In the waters off New England, one of Earth’s rarest mammals swims slowly, mouth agape. The North Atlantic right whale filters clouds of tiny reddish zooplankton — called Calanus finmarchicus — from the sea. These zooplankton, no bigger than grains of rice, are the whale’s lifeline. Only about 370 of these massive creatures remain.

For decades, tracking the tiny plankton meant sending research vessels out in the ocean, towing nets and counting samples by hand. Now, scientists are looking from above instead.

Using NASA satellite data, researchers found a way to detect Calanus swarms at the ocean surface in the Gulf of Maine, picking up on the animals’ natural red pigment. This early-stage approach, described in a new study, may help researchers better estimate where the copepods gather, and where whales might follow.

Tracking the zooplankton from space could aid both the whales and maritime industries. By predicting where these mammals are likely to feed, researchers and marine resource managers hope to reduce deadly vessel strikes and fishing gear entanglements — two major threats to the species. Knowing the feeding patterns could also help shipping and fishing industries operate more efficiently.

Read the full story at NASA

Arctic Report Card looks at changing food, predator-prey relationships in Gulf of Alaska

December 31, 2023 — A new federal report on Alaska ecosystems warns that the current El Nino status and associated warming surface waters predicted for the winter and spring of 2024 may result in reduced availability of Gulf of Alaska needed by many groundfish and reduced quality of that zooplankton itself.

According to NOAA Administrator Rick Spinrad, the overriding message from this year’s report card is that now in the time for action.

“NOAA and our federal partners have ramped up our support and collaboration with state, tribal and local communities to help build climate resilience,” Spinrad said. “At the same time, we as a nation and global community must dramatically reduce greenhouse gas emissions that are driving these changes.”

The 2023 Gulf of Alaska Ecosystem Status Report is part of NOAA’s 2023 Arctic Report Card, a cooperative effort of federal and state agencies and numerous other collaborators.

Read the full article at the Cordova Times

Zooplankton Research Reveals a Glimpse of the Potential Future Northern Bering Sea Ecosystem

February 10, 2023 — The following was released SeafoodSource:

From fish to whales, nearly every predator in the sea eats zooplankton, or eats something that does. Understanding how climate impacts zooplankton can help us predict ecosystem changes to build resilient, climate-ready fisheries and communities.

A new collaborative NOAA Fisheries study looked at northern Bering Sea zooplankton over 17 years (2002–2018) of both cold conditions and unprecedented heat. The research revealed that loss of sea ice resulted in dramatic shifts. Large, high-fat copepods that are important food for many predators dwindled, while small zooplankton expanded in both number and range. This altered prey field may have contributed to ecosystem-wide impacts on fish, seabirds, and marine mammals.

“Zooplankton are near the base of the marine food web. If the base changes, we will see changes higher in the foodweb. There will be species that respond better than others,” said study lead Dave Kimmel, NOAA Fisheries, Alaska Fisheries Science Center EcoFOCI program. “By studying zooplankton we can see what the future ecosystem might look like. That knowledge can help people who make a living on it, or manage it, adapt and prepare.”

Read the full release here

Brad Warren & Julia Sanders: Washington’s Initiative 1631 will help fight ocean acidification

November 2, 2018 — We write today to announce our support for Washington’s Initiative 1631. As businesses who rely on healthy fisheries for a significant portion of our income, we believe this is a well-designed policy that offers us – and our customers – the best possible chance against an uncertain future fraught with the threats of changing ocean conditions.

It’s become clear that our fisheries need a lifeline. Here in Washington, we are experiencing the worst ocean acidification anywhere in the world. Research has firmly established the cause of this problem: emissions from burning coal, oil and gas mix into the ocean, altering its chemistry. The consequences loomed into headlines a decade ago when the oyster industry lost millions and nearly went out of business during the oyster seed crisis. Temporary and limited adaptation measures in hatcheries are keeping them in business, but in the rest of the oceans, fisheries that put dinner on billions of tables are at risk. Here in the Northwest, harvests are already being eroded and even shut down by the effects of unchecked carbon emissions.

The “warm blob,” an unprecedented marine heatwave off the West Coast, reached its height in 2015 and caused mass fatalities. In the Columbia River, a quarter-million salmon died. The largest recorded toxic algae bloom shut down the Dungeness crab fishery for months. The food web crashed, and marine creatures were spotted farther north than ever before. Sea surface temperatures never returned to their previous norm, and new research indicates another blob is forming.

Summers have become synonymous with a smoky haze from wildfires causing poor visibility and poor health – this summer the National Weather Service warned even healthy adults in some Washington areas to stay indoors due to hazardous air quality. At the same time, our iconic orca whales are starving from a lack of Chinook salmon. The Chinook in turn are suffering from a lack of the zooplankton that juveniles eat.

Research has made it clear that some of our most lucrative fisheries are vulnerable to ocean acidification: king crab, Dungeness crab, and salmon. Scientists also warm that combining stressors – like warming with ocean acidification – makes survival in the ocean all the more precarious.

Read the full op-ed at Seafood Source

 

Copepods: Cows of the Sea

October 6, 2017 — If you look very closely at a glassful of water from a bay or the ocean, you would probably be surprised by the life inside. You might see miniature crustaceans the size of the period at the end of this sentence or baby crabs and fish that spend only a short span of their lives this small. These creatures are zooplankton, aquatic animals that drift with the currents.

It’s the Little Things 

These tiny animals form the basis of the food web of estuaries, coastal waters, and oceans. Zooplankton feed on microscopic plant-like organisms called phytoplankton, which get their energy from the sun. Tiny crustacean zooplankton called “copepods” are like cows of the sea, eating the phytoplankton and converting the sun’s energy into food for higher trophic levels in the food web. Copepods are some of the most abundant animals on the planet.

Fish such as anchovies cruise through the water with their mouths wide open, filtering copepods and other zooplankton from the water. Anchovies and other planktivores (plankton-eaters) are prey for bigger animals, like tuna, sharks, marine mammals, and seabirds.

Read the full story at NOAA Fisheries GARFO

Fishery Group Comes Out Against Seismic Surveys

June 23, 2017 — The New England Fishery Management Council is asking the Trump Administration to slow its push for offshore oil and gas developments on the East Coast.

An Executive Order signed in April urges oil exploration in the mid and south Atlantic. Currently, five companies are seeking permits to conduct what are called seismic surveys in these areas.

Those surveys fire powerful sound waves into the ocean floor. Then, surveyors listen to the echoes to detect oil reserves.

Scientists increasingly worry those sound waves disturb whales and fish. A study published this Wednesday in the journal Nature says the surveys kill off zooplankton, a cornerstone of the ocean food chain.

Thomas Nies is Executive Director of the New England Fishery Management Council. His organization has spoken out about the surveys, because of concerns they’ll affect fisheries here. “We’re concerned about seismic surveys. The council isn’t convinced that we have enough information on what their impacts are across a wide range of species.”

Read the full story at NHPR

RHODE ISLAND: Fishing Report: Hearing on menhaden set for Dec. 19 at URI

December 8, 2016 — Atlantic menhaden are an important forage fish for striped bass, bluefish, tuna and other species. Recreational anglers claim that fishing for these game fish is off when the quantity of forage fish is down. Additionally, Atlantic menhaden are filter feeders with each fish processing thousands of gallons of water filtering out plankton to help prevent algae blooms.

So if you want to impact regulations pertaining to this species, now is the time to become active. There will be an Atlantic menhaden public hearing to talk about important Fishery Management Plan issues on Dec. 19 at 7 p.m. at the Corless Auditorium at the URI Bay Campus, Narragansett. The hearing will address a new Public Information Document that is a predecessor to Amendment 3 to the Atlantic menhaden Fishery Management Plan that will be developed later this year.

NOAA’s website says Atlantic menhaden “play an important role in the ecosystem as both a forage fish for striped bass, weakfish, bluefish, and predatory birds such as osprey and eagles as well as serving as a filter feeder because they feed on phytoplankton and zooplankton at various life stages.”

So rather than just managing Atlantic menhaden to ensure they remain sustainable as a species, the PID aims to include ecosystem-based management measures to ensure that enough Atlantic menhaden are left in the water for other species to eat as forage fish as well as enough to fulfill their ecological role.

Atlantic menhaden are plentiful. A 2015 stock assessment for the resource relates they are in good condition, not overfished nor experiencing overfishing. The PID can be found on the ASMFC website at www.asmfc.org. Public comments can be made at the hearing and will also be accepted in writing until 5 p.m. on Jan. 4, 2017. Comments can also be emailed to comments@asmmfc.org (subject line: Menhaden PID).

Read the full story at the Providence Journal