Nearly 30 dead sharks washed ashore along a stretch of beach in sea isle city, raising questions about what caused the unusual marine die-off.
Dogfish shark on beach - Nearly 30 dead sharks washed ashore along a stretch of beach in Sea Isle City, raising questions about what caused the unusual marine die-off.

Mystery Surrounds 29 Dead Sharks Found Along Sea Isle City Beach

Posted by
2 mins read
August 13, 2026
A morning walk along a Jersey Shore beach turned into a mystery after a woman discovered 29 dead sharks scattered across nearly 10 blocks of sand, prompting questions about what caused the unusual die-off.

SEA ISLE CITY, N.J. — A woman walking along the beach in Sea Isle City made an unsettling discovery Wednesday morning when she found 29 dead sharks washed ashore over a stretch of approximately 10 blocks.

Michelle Greenling told CBS Philadelphia she initially wasn’t alarmed after spotting the first few sharks, but quickly realized something unusual was happening as she continued her walk.

“Seeing the first couple wasn’t too surprising,” Greenling said. But after finding a fourth and fifth shark, she said, “I knew something was up.”

By the end of her walk, Greenling had counted 29 dead sharks, several of which appeared to have red markings on their undersides.

“It was definitely concerning,” she said. “I was concerned about the water. I was concerned about the sharks.”

Marine experts believe the animals were likely juvenile spiny dogfish, a small species of shark commonly found in the waters off New Jersey. While the exact cause remains unknown, several explanations are being considered.

Stephen Nagiewicz, an adjunct professor of marine science at Stockton University, told CBS Philadelphia that changing tides may have stranded the young sharks before they died.

“A couple of things it could be,” Nagiewicz also told 6ABC. “There’s something in the water, and they got sick and died. That’s probably unlikely since people haven’t been affected.”

Another possibility, he said, is that commercial fishermen discarded the sharks offshore after catching them unintentionally, allowing currents and tides to carry the carcasses onto the beach.

Key Points

  • A woman discovered 29 dead sharks along approximately 10 blocks of beach in Sea Isle City.
  • Marine experts believe the sharks were likely juvenile spiny dogfish that may have stranded during changing tides or were discarded offshore by fishermen.
  • The New Jersey Department of Environmental Protection has been notified, and the exact cause remains unknown.

Spiny dogfish are among the most abundant shark species along the Atlantic Coast. They often travel in large schools and are frequently caught as bycatch in commercial fishing operations targeting other species.

The New Jersey Department of Environmental Protection has been notified of the reported shark deaths. As of Thursday, officials had not announced whether the sharks would be collected for examination or whether an investigation had determined a definitive cause.

Although seeing dozens of sharks on the beach may be alarming, experts emphasized there is currently no indication that the deaths were caused by a water quality issue affecting swimmers. No illnesses or unusual conditions affecting beachgoers have been reported.

Late summer is also a period when marine life becomes more active along the Jersey Shore as warmer ocean temperatures attract baitfish, sharks, dolphins and other species closer to the coastline. Wildlife experts say isolated fish and shark strandings can occur naturally, though discovering nearly 30 animals in one location is uncommon.

FAQ

What kind of sharks were found?

Experts believe the animals were juvenile spiny dogfish, a small shark species commonly found in Atlantic waters off New Jersey.

Why were so many sharks on the beach?

The cause has not been confirmed. Experts say the sharks may have become stranded by tides or may have been discarded offshore after being caught by commercial fishermen.

Is it safe to swim at Sea Isle City?

There is currently no indication that the shark deaths were caused by a water quality issue affecting swimmers. No illnesses connected to the incident have been reported.

Did anyone report the discovery?

Michelle Greenling reported finding the sharks while walking the beach and shared her observations with local news outlets.

Is the state investigating?

The New Jersey Department of Environmental Protection has been notified of the incident. Officials have not yet announced a definitive cause.

Sources: CBS Philadelphia, 6ABC Philadelphia, New Jersey Department of Environmental Protection, Stockton University.

Phil Stilton

Phil Stilton is the Editor and Publisher of Shore News Network, an independent digital newsroom providing original reporting on New Jersey, national news, government, public policy, public safety, courts, and community affairs.

As founder of the publication, Stilton leads editorial strategy, investigative reporting, and daily newsroom operations while overseeing coverage that reaches millions of readers annually.

With extensive experience covering municipal government, county government, state legislatures, elections, law enforcement, emergency management, and public records, Stilton specializes in translating complex government actions into clear, factual reporting. His work frequently relies on primary source documents, including court filings, legislation, public meeting records, election finance disclosures, government databases, police reports, and Freedom of Information and Open Public Records Act (OPRA) requests. He has reported extensively on local government accountability, taxpayer spending, campaign finance, public corruption investigations, infrastructure, public safety, and the policies affecting New Jersey residents.

Under Stilton's editorial leadership, Shore News Network has grown into one of New Jersey's largest independent digital news organizations, publishing thousands of original news articles each year while providing breaking news coverage, investigative reporting, and analysis across state and local government. The publication's reporting is routinely sourced from official government agencies, public officials, court records, and firsthand documentation, with a commitment to transparency, attribution, corrections when warranted, and clearly distinguishing factual reporting from opinion.

Stilton's journalism follows established newsroom standards emphasizing accuracy, verification, fairness, and accountability. Every effort is made to verify information through official records and multiple reliable sources before publication. His reporting is intended to provide readers with timely, well-documented information that helps them understand the issues affecting their communities, while maintaining editorial independence from political parties, government agencies, advocacy organizations, and commercial interests.

Readers can submit story tips, corrections, public records, or media inquiries through the official Shore News Network website or its verified social media channels. Shore News Network welcomes corrections and updates when new information becomes available as part of its ongoing commitment to accurate and transparent journalism.

Don't Miss