Some beaches around the Nantucket area have temporarily prohibited swimming after numerous shark sightings and predations.

Swimming along Great Point is currently prohibited due to shark activity in the area, Sarah Cassell, managing director of marketing and communications for the Trustees of Reservations confirmed.

Great Point sits on the northern point of Nantucket Island, off the coast of Massachusetts.

The Coskata-Coatue Wildlife Refuge, at 1,117 acres long, acts as both a warm weather destination and a wild remote barrier beach. The swimming closure is in effect in the area beyond mile marker 5 on the refuge, the area where the most recent shark activity occurred, according to the Trustees of Reservations.

“After several shark sightings and predation in the area, we’ve decided to implement a swimming closure around Great Point until further notice,” the Trustees of Reservations said in a statement. “This is not a decision we’ve made lightly. Visitors’ safety is our utmost concern, especially given the remote location of this beach should a serious incident occur. We’ll continue to monitor shark activity in partnership with the U.S. Fish and Wildlife Service.”

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The refuge is owned jointly by the Trustees of Reservations and the U.S. Fish and Wildlife Service.

The rest of the refuge will remain open for recreational use, but signs warning visitors to take caution while in the water will remain in place.

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