A 14-foot thresher shark met a tragic end on Tuesday when it became stranded in the shallow waters off Massachusetts’ coastline.

The New England Coastal Wildlife Alliance (NECWA), a nonprofit organization, reported to Fox News Digital on Wednesday that the shark was initially observed alive at Mayo Beach in Wellfleet, Massachusetts. Sadly, the shark died shortly before the NECWA team could reach it.

“On Tuesday morning, NECWA received multiple alerts about a potentially live thresher shark stranded in the shallow waters near Mayo Beach, Wellfleet, MA,” stated the alliance in a Facebook update on Wednesday. “Our team mobilized quickly and headed to the location to attempt a rescue. Unfortunately, the shark succumbed just before our arrival.”

Images from the scene depict the large-eyed, slender thresher shark lying on the shore, with its notably long, whip-like tail extending to about half its total body length. The shark appeared to be injured, with visible track-like marks across its body.

A thresher shark lies on the shore in Wellfleet, Massachusetts, after becoming stranded. (New England Coastal Wildlife Alliance)

NECWA mentioned that by the time their team reached the location, the shark was already in poor condition. A necropsy has been performed to understand the circumstances leading to its stranding.

“The fish that died in Wellfleet was alive when first sighted but was not in great shape,” Marine Biologist and President of NECWA Krill Carson told Fox News Digital.

Fox News Digital reached out to shark biologist John Chisholm for more information on the necropsy.

A 14-foot-long shark stranded at Mayo Beach in Wellfleet, Massachusetts, on Dec. 2, 2025.  (New England Coastal Wildlife Alliance)

The organization said strandings of thresher sharks are particularly common during the colder months along the shores of Cape Cod. Carson added that the majority of stranded threshers they encounter are male.

“Not unusual for thresher sharks to strand in New England in the fall as they are trying to navigate to warmer waters to the south,” the organization said in the Facebook post. “Like many marine animals, this shark took a wrong turn and ended up in Wellfleet’s inner harbor.”

A shark appearing injured dies after getting stranded off Mayo Beach, Wellfleet, Massachusetts, on Dec. 2, 2025.  (New England Coastal Wildlife Alliance)

After becoming stranded, thresher sharks are at high risk of dying because they cannot tolerate prolonged exposure to cold temperatures, Carson said. She noted that bay water temperatures at that time were roughly below 50 degrees and continued to drop.

A male thresher shark was found stranded during migration. (New England Coastal Wildlife Alliance)

“A handful of threshers strand each season as they get trapped inside Cape Cod and are unable to continue their migration south,” Carson told Fox News Digital. “If they stay in our area too long, then they will become cold-stunned or cold-shocked and die.”

NECWA is an all-volunteer nonprofit organization. Contributions can be made at necwa.org.