New York City onlookers were surprised on Monday when a whale was spotted swimming under the Williamsburg Bridge on Monday, ...

The whale was spotted swimming in the East River between New York City and Brooklyn, beneath the Williamsburg Bridge.

People on the Brooklyn shore got a glimpse of the whale flashing its tail out of the water, according to the U.S. Coast Guard ...

Video shows a whale swimming under the Williamsburg Bridge on Monday, surprising onlookers. The sighting came after a mother ...

Danielle Brown, Gotham Whale’s director of research, theorized the whale braved the heavy traffic of the East River to hunt ...

A humpback whale was spotted under the Brooklyn Bridge, recorded on video, marking a rare occurrence for the East River.

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Onlookers are also heard gasping in the footage. "It is not clear whether the whale is still in [the New York City] area," Gotham Whale research director Danielle Brown told Fox News Digital.

The humpback spotted splashing in the East River earlier this week has seemingly left the busy channel as quickly as it came — but not without leaving a whale-sized mark on the Big Apple.

Onlookers are also heard gasping in the footage. Gotham Whale, an organization that tracks marine life in the New York City area, told Fox News Digital that the sighting was "somewhat [of an ...