GANSBAAI, SOUTH AFRICA - OCTOBER 19: A Great White Shark is attracted by a lure on the
GANSBAAI, SOUTH AFRICA - OCTOBER 19: A Great White Shark is attracted by a lure on the 'Shark Lady Adventure Tour' on October 19, 2009 in Gansbaai, South Africa. The lure, usually a tuna head, is attached to a buoy and thrown into the water in front of the cage with the divers. The waters off Gansbaai are the best place in the world to see Great White Sharks, due to the abundance of prey such as seals and penguins which live and breed on Dyer Island, which lies 8km from the mainland. (Photo by Dan Kitwood/Getty Images)
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(CNN) —  

A 10-foot great white shark has been spotted deep in the Long Island Sound, one of the first of the ocean predators researchers have ever tracked in the area.

PHOTO: Robert Snow/Ocearch

Ocearch, a nonprofit group that tags and tracks sharks, sea turtles and other marine animals, detected the shark off the coast of Greenwich, Connecticut, Monday.

“As far as we know, it is unusual for white sharks to visit the area,” the organization tweeted.

In 2016, Ocearch tracked a 4-foot juvenile great white shark in the Sound, though it didn’t venture as far into the tidal estuary.

The current visitor is a “sub-adult” male shark – the developmental phase between juvenile and adult – and he was first tagged off the Nova Scotia coast in October 2018. The shark initially traveled south, reaching the Gulf of Mexico in January, before returning north along the East Coast of the US.

The shark traveled from Nova Scotia to the Gulf of Mexico before returning north.
PHOTO: Robert Snow/Ocearch
The shark traveled from Nova Scotia to the Gulf of Mexico before returning north.

SeaWorld, a partner of Ocearch, named the shark Cabot, after Italian explorer John Cabot. When first tagged, he measured 9 feet 8 inches, and weighed 533 pounds.

He still has some growing to do: according to Smithsonian Ocean, male great white sharks typically measure between 11 and 13 feet long, while females can exceed 15 feet.

Cabot has accrued more than 7,000 followers on Twitter, while his trip to Long Island saw Ocearch’s online tracker “overloaded” with visitors, the nonprofit organization tweeted.

He was last detected Tuesday in the New York Bight, south of Long Island.