NEW JERSEY — Beachgoers heading to the Jersey Shore this summer are being urged to stay alert after reports of venomous jellyfish appearing in coastal waters and back bays across the state.
Marine biologists and New Jersey officials are warning about the return of the clinging jellyfish, an invasive species known for delivering an extremely painful sting. The tiny jellyfish, which grows to only about an inch in diameter, can be difficult to spot because of its nearly transparent body. Experts say it is commonly found in shallow bays, estuaries, eelgrass beds, and coastal rivers rather than the open ocean.
The warning comes after a South Jersey child reportedly suffered days of severe pain following a suspected clinging jellyfish sting in Ocean County. Researchers from Montclair State University say the species has been documented from Sandy Hook to Cape May and may be more abundant this season.
While no fatalities have been linked to clinging jellyfish stings, victims can experience intense burning pain, rashes, swelling, and prolonged discomfort lasting several days. Officials recommend avoiding areas with heavy eelgrass or aquatic vegetation where the jellyfish tend to congregate.
Beachgoers should also be aware of occasional sightings of the Portuguese man o’ war, a highly venomous marine organism often mistaken for a jellyfish. Although less common along the Jersey Shore, sightings have been reported along the New Jersey coastline in recent years. Its long tentacles can deliver painful stings even after the organism has washed ashore and appears dead.
What To Do If Stung
Health officials recommend:
- Exit the water immediately.
- Do not rub the affected area.
- Carefully remove any visible tentacles using gloves or another object.
- Rinse with saltwater rather than freshwater.
- Seek medical attention if symptoms worsen or if breathing difficulties develop.
Researchers say clinging jellyfish are typically most active from late spring through early summer, with populations often peaking in May, June, and July. Visitors enjoying the Jersey Shore are encouraged to remain aware of posted beach advisories and avoid handling any jellyfish or jellyfish-like organisms found in the water or washed up on the sand
