The "incredibly rare" event was captured by the New England Aquarium aerial survey team.
Researchers say rising global temperatures may be a factor in the sighting.
A rare gray whale, which is usually found in the Pacific Ocean, was spotted 30 miles from Nantucket.
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An extremely rare gray whale was spotted in the Atlantic
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Mystery in the Atlantic: Gray Whale's Uncharted Return.
An aerial unit with the New England Aquarium made a rare sighting
Incredibly rare' gray whale spotted 200 years after extinction
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Gray whale believed to be extinct in Atlantic ocean for 200 years
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Rare gray whale, extinct in the Atlantic for 200 years, spotted
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