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"National Stranding Network"

National Stranding Network Results

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2022 and 2023 Combined Report of Marine Mammal Strandings in the United States

This report details marine mammal stranding rates, trends, and activities in the United States for both 2022 and 2023. In 2022, there were 6,061 confirmed marine mammal strandings; in 2023, there were 6,648.
July 31, 2025 - Feature Story ,
Alaska
New England/Mid-Atlantic
Pacific Islands
Southeast
West Coast
National
A minke whale carcass lies on a rocky beach. There are several lines to secure it in place while responders take measurements and samples. A complete necropsy of a minke whale on Blakely Island, Washington. The necropsy revealed injuries—including severe bruising and broken ribs and vertebrae—consistent with a vessel strike. Credit: The Whale Museum

$4 Million Awarded for Marine Mammal Rescue Efforts through Prescott Grant Program

NOAA Fisheries recommended awarding 37 grants, totaling more than $4 million, through the John H. Prescott Marine Mammal Rescue and Assistance Grant Program to our partners in 16 states.
September 30, 2024 - Feature Story ,
Alaska
New England/Mid-Atlantic
Pacific Islands
Southeast
West Coast
National
Humpback whale carcass lying on beach with two people measuring the pectoral flipper Authorized responders from the Seacoast Science Center take measurements of a dead humpback whale that stranded in Marblehead, Massachusetts. Credit: Seacoast Science Center.

Celebrating Alaskan Indigenous Members of the Marine Mammal Stranding Network

Tribes and local governments play an important role in collecting marine mammal data and responding to entangled and stranded marine animals throughout remote areas of Alaska.
November 19, 2021 - Feature Story ,
Alaska
A Tribal member stands next to a stranded bowhead whale that was killed by killer whale predation. Blue sky, white waves, and a dark sand beach. Perry Ashagnuak (Utqiagvik) collecting an eye from a stranded bowhead whale that had been killed by killer whale predation. Photo credit: Raphaela Stimmelmayr

Alaska Marine Mammal Stranding Partners Necropsy Minke Whale Near Gustavus

Findings highlight risk to whales and dolphins from vertical lines in marine environment.
June 22, 2021 - Feature Story ,
Alaska
A National Park Service whale research vessel tows the dead minke whale through muddy waters after recent rain storms. © 2021 Sean Neilson A National Park Service whale research vessel tows the dead minke whale through muddy waters after recent rain storms. © 2021 Sean Neilson

SWFSC Stranding Collections

What we collect and how tissues are used 
West Coast

Marine Mammal Life History

Data collected from stranded and bycaught marine mammals are critical to understanding their life history
West Coast

SWFSC Stranding Investigations

Investigating trends in marine mammals strandings
West Coast

Is That Steller Sea Lion in Distress? Waving? Or Is It...Thermoregulation?

NOAA Fisheries often receives reports of Steller sea lions exhibiting this behavior from concerned citizens who think the sea lion may be in distress.
May 07, 2021 - Feature Story ,
Alaska
Steller sea lions thermoregulating Sea lions look like they are waving, but they are thermoregulating.

2017 National Report of Marine Mammal Strandings in the United States

NOAA Fisheries releases the 2017 National Report of Marine Mammal Strandings in the United States, the first of a series of annual stranding reports.
March 23, 2021 - News ,
National
Photo of harbor seals being released following rehabilitation at The Marine Mammal Center, California.

2017 National Report of Marine Mammal Strandings in the United States

NOAA Fisheries released the 2017 National Report of Marine Mammal Strandings in the United States. Marine mammals strand for a variety of reasons, and NOAA Fisheries tracks this data to monitor threats to wild marine mammal populations.
March 23, 2021 - Other Reports ,
National