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2017–2023 North Atlantic Right Whale Unusual Mortality Event

Since 2017, dead, seriously injured, or sublethally injured or ill North Atlantic right whales have been documented, necessitating an Unusual Mortality Event declaration and investigation.

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Photograph from the North Atlantic right whale Catalog #3560 of "Snow Cone," a North Atlantic right whale sighted December 2, 2021 that was entangled in gear and with a new calf. Photo credit: Florida Fish and Wildlife Conservation Commission taken under NOAA permit 20556. North Atlantic right whale Catalog #3560 ‘Snow Cone’ sighted December 2, 2021 entangled and with a new calf. Photo credit: Florida Fish and Wildlife Conservation Commission taken under NOAA permit 20556.
Biologist on a ship collecting data during buoyless lobster trap tests. A Northeast Fisheries Science Center biologist collecting data during buoyless lobster trap tests.
NARW #3720 and calf North Atlantic right whale mother and calf. Credit: Clearwater Marine Aquarium Research Institute, taken under NOAA permit #20556-01.