Gray whales live in the Pacific Ocean. They migrate between Mexico and Alaska and eat crustaceans along the ocean floor.
For researchers, the presence of this whale in the Atlantic is partly attributable to climate change.
Gray whales feed during the summer off the coast of Alaska. In the past, the Northwest Passage in the Arctic Ocean was stuck in ice, but with global warming, this is no longer systematic.
Passages may have opened and allowed the whale to cross, probably accidentally, and it ended up in the wrong ocean, says Orla O'Brien.
In the past 15 years, there have been other reports of gray whales in the Atlantic, in the Mediterranean, off Namibia, and recently near Florida. According to the scientist, the latter could be the same whale as the one she saw.
According to Orla O'Brien, it is unlikely that the gray whales will return to the Atlantic permanently in the near future, but she does not exclude that this could happen in the long term, in several centuries.
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Orla O'Brien is one of the two scientists of the New England Aquarium who observed a gray whale.
For a population to become established, it takes much more than one or two whales, she continues.
For O'Brien, this sighting is a once-in-a-lifetime experience. But it's also a reminder that things are changing globally and what that means for animals in the oceans.