Coastal communities in New England are experiencing a significant influx of giant lion's mane jellyfish, prompting public safety alerts on several Massachusetts beaches. These massive marine creatures, with tentacles that can extend up to 120 feet, are causing concern due to their potent stings, which can remain dangerous for up to 25 days after the jellyfish has died.
The current swarm is reportedly the largest observed since 2020, according to The Boston Globe. The jellyfish have been sighted along the Nahant peninsula and in areas like Salem and South Boston. The Boston Center for Youth and Families has warned swimmers at its Curley Community Center beach that jellyfish are present and have stung individuals, advising them to swim at their own risk.
Authorities are cautioning the public to keep children and pets away from any stranded jellyfish, alive or dead, and to avoid touching them or their detached tentacles. The New England Aquarium notes that predicting these swarms is complex, influenced by a variety of factors including water temperature, prevailing currents, and wind patterns.
For those who do encounter a sting, experts at the Mayo Clinic advise against common myths, such as applying urine. Instead, the recommended treatment involves carefully removing any tentacle fragments with tweezers, soaking the affected area in hot water, and applying hydrocortisone ointment. Lion's mane jellyfish are among the largest species globally, with one of the largest recorded specimens found off the coast of Massachusetts.