A great white shark named Cabot — who is tagged with an electronic tracker and has a Twitter feed that makes him appear friendly — was detected in Long Island Sound this week. But researchers now say that their initial detection may have been wrong, raising questions about the exact location of Cabot and other sharks just as New Yorkers are heading into the water.

[Read more about the shark that was (or wasn’t) in Long Island Sound.]

Are there sharks in the waters off New York?

In the East River, no.

In the Atlantic Ocean, of course.

In Long Island Sound … possibly? The research organization Ocearch said Cabot was detected in the waters off Greenwich, Conn., yesterday morning. But that night, he was detected in Great South Bay, between Jones Beach and Fire Island.

Maybe Cabot swam an intricate route past New Rochelle, down the East River, hooked a sharp left and bypassed most of the South Shore — or Ocearch’s data was inaccurate. (Later data appeared to show Cabot well east of Montauk, as if in a hurry to get to Nantucket. )

In the past, where have sharks been detected?

In September 2015, a six-foot hammerhead shark named Elias was detected south of East Hampton on Long Island.