North Atlantic Right Whale

Eubalaena glacialis — one of the world's most endangered large whales, with approximately 380 individuals left and fewer than 70 breeding females.

IUCN Red List: Critically Endangered (upgraded from Endangered in recent years)
Population trend: Declining since 2010
Latest count: Approximately 380 individuals, including about 70 reproductively active females (NOAA, 2026 calving season report)

The species has been experiencing an Unusual Mortality Event since 2017, which has affected more than 20 percent of the population through sickness, injury, or death. In the last decade, deaths have outnumbered births — a trajectory that signals imminent extinction without urgent intervention.

North Atlantic right whales are found along the Continental Shelf of the East Coast of the United States and Canada. They migrate seasonally: spending winters in calving grounds off the Southeast U.S. (primarily between Georgia and Florida), and summers feeding in the waters of New England, the Bay of Fundy, the Gulf of St. Lawrence, and the Gulf of Maine.

This coastal distribution makes them especially vulnerable to human activities — they live and migrate through some of the busiest shipping lanes and most heavily fished waters in the world.

Right whales are ecosystem engineers. Through their feeding and defecation, they redistribute nutrients from the ocean bottom to the surface, fertilising phytoplankton blooms that form the foundation of the marine food web. Their fecal plumes bring nitrogen and other nutrients into sunlit waters, driving productivity that supports fish, seabirds, and other marine life.

When right whales die, their massive carcasses — some weigh up to 70 tonnes — sink to the ocean floor and sustain entire deep-sea communities for years, a process known as "whale fall" that supports hundreds of species.

Beyond ecology, the North Atlantic right whale is a flagship species for marine conservation: its fate reflects the health of coastal oceans and our ability to coexist with the largest creatures on Earth.

Entanglement in fishing gear — the leading cause of death and injury. Right whales become trapped in lobster, crab, and gillnet lines. Entanglement can cause severe injury, chronic stress, reduced reproduction, and death. Females now give birth only every 7 to 10 years (compared to a healthy 3-4 year interval), largely due to chronic entanglement stress.

Ship strikes — collisions with commercial vessels are the second major killer. Right whales feed near the surface and are slow swimmers, making them vulnerable in busy shipping lanes from Florida to Nova Scotia.

Climate change & ocean warming — warming waters are shifting the whales' prey (copepods) northward and eastward, forcing right whales into new, unprotected areas with heavier vessel traffic and different fishing gear. This threat links directly to the lab's Ocean warming & acidification index entry.

Reduced reproduction — with fewer than 70 breeding females and declining calf survival, the population cannot recover at current reproductive rates. Females are under-nourished, stressed, and ageing without replacement.

NOAA Fisheries (U.S.) — leads recovery efforts under the Endangered Species Act and Marine Mammal Protection Act. In 2026, NOAA is advancing a new Advance Notice of Proposed Rulemaking to revise vessel speed restrictions in right whale habitat, following the withdrawal of a 2025 proposed rule. NOAA also coordinates entanglement response, monitors the annual calving season (23 calves identified in the 2025-2026 season), and conducts health assessments.

Government of Canada — right whales are protected under the Species at Risk Act and Fisheries Act. Canada has implemented seasonal fishing closures, mandatory vessel slowdowns in the Gulf of St. Lawrence, and real-time detection systems.

North Atlantic Right Whale Consortium — a collaborative network of more than 200 participants from research institutions, conservation groups, government agencies, fishing and shipping industries, coordinating data-sharing and recovery planning.

International Fund for Animal Welfare (IFAW) — runs the 2026 North Atlantic right whale calving season program, tracking mothers and calves, deploying acoustic monitoring, and operating the WhaleAlert mobile app to warn mariners of whale presence in real time.

Canadian Wildlife Federation — leads the Atlantic Whale Conservation Program, working with fish harvesters, Indigenous communities, and researchers to reduce entanglement risk and promote stewardship in Canadian waters.

Woods Hole Oceanographic Institution & New England Aquarium — provide cutting-edge research on right whale health, behaviour, distribution, and threats; develop ropeless fishing technologies and real-time monitoring systems.

Latest action (June 2026): NOAA's ongoing rulemaking process is expected to introduce technology-driven, adaptive vessel speed measures. Simultaneously, NGOs are expanding real-time detection networks and working with the fishing industry on ropeless gear trials.

fisheries.noaa.gov
fisheries.noaa.gov
fisheries.noaa.gov
https://www.iucnredlist.org/species/[code postal]/50380891
coastalstudies.org
whoi.edu
ifaw.org
ifaw.org
cwf-fcf.org
narwc.org