The sighting was reported on Long Island at Nickerson Beach in Nassau County.
As a precaution, the town of Hempstead also closed Lido Beach and Malibu Beach for swimmers for a brief period early Saturday afternoon, Aug. 3.
Officials said the shark was spotted about 75 feet from the shore.
Swimming resumed at the three beaches a short time after the sighting.
The Town of Hempstead issued a statement stating, "Our highly skilled lifeguards are on alert and will continue to monitor the waters closely to ensure your safety."
Click here to follow Daily Voice Bronxville and receive free news updates.