The summer of 2024 marked a historic event for marine science: the appearance of a North Atlantic right whale in Donegal Bay, Ireland, a species considered critically endangered. Months later, the same specimen was sighted near Boston, United States, following a migration pattern never documented for this species.
This discovery not only surprised marine biologists but also reignited concern about the future of these ocean mammals, whose global population barely reaches 380 individuals.
A historic event in Irish waters
According to CBS News Boston, such a migration from the Irish coast to the American coast had never been recorded before. The sighting in Ireland was already considered an event of historical significance, as there were no records of this species’ presence in Irish waters in the last 100 years.
Scientists suggest that if such journeys occurred in the past, they were not documented, possibly due to the abundance of specimens in previous centuries, before the species faced a dramatic decline.
Padraig Whooley, from the Irish Whale & Dolphin Group, commented ironically:
“But where else would one expect to find a right whale with Irish connections if not in Boston?”
Identification and tracking of the specimen
The tracking of the whale was made possible through a combination of field observation and digital photo analysis.
- In November 2024, Ian Schosberg, from the Center for Coastal Studies, spotted the animal about 37 km off the coast of Boston.
- Collaboration with the New England Aquarium allowed for the comparison of images and scars, confirming it was the same specimen sighted in Ireland.
This identification process is feasible precisely because of the scarcity of individuals, allowing scientists to maintain detailed catalogs of each specimen.
A species in critical condition
The North Atlantic right whale faces constant threats:
- Bycatch.
- Maritime traffic.
- Environmental changes.
With only 380 specimens worldwide, each sighting gains scientific, media, and social significance. The individual identification of the few remaining specimens has become a key tool for research and conservation.
New migratory patterns
The Atlantic crossing adds to other atypical movements recently reported. Traditionally, it was believed that the populations of the eastern and western North Atlantic almost never crossed the ocean. However:
- In May 2024, two right whales —Curlew and Koala— traveled from the Mid-Atlantic coast of North America to the Caribbean, a region where they had never been detected before.
- These movements suggest that the species might be changing its historical migratory routes in search of alternative habitats, likely in response to alterations in their natural environment.
Unique biological traits
North Atlantic right whales belong to one of the largest lineages of baleen whales in the world.
- They can exceed 13 meters in length.
- They reach weights between 39,000 and 100,000 kilos.
- They exhibit a notable biological peculiarity: the largest testicles in proportion in the animal kingdom, which can weigh up to 450 kilos each.
This trait is part of their reproductive adaptation and has been documented by science as an extreme example of biological specialization.
The physical characteristics, numerical scarcity, and new migratory patterns make the North Atlantic right whale an emblem of the fragility and resilience of ocean fauna. Their survival depends on both scientific research and international conservation commitment.
Each unusual sighting not only provides valuable information for science but also serves as a reminder of the urgency to protect a species that is on the brink of extinction.
