Hull officials issue warning on scary jellyfish in area waters The sting from a Lion’s Mane is “moderately painful” and can cause reactions that require medical treatment. A foot-wide Lion's Mane jellyfish floated in the water of Scituate Harbor as it passed in the current of high tide at Veteran's Memorial Bridge in June 2020. Photo by John Tlumacki/Globe Staff(metro/FILE) By Travis Andersen, The Boston Globe June 3, 2021 | 8:56 AM Email Hull officials on Wednesday warned of recent sightings of humongous Lion’s Mane jellyfish in area waters including Nantasket Beach. Deputy Fire Chief William Frazier provided details in a strongly worded statement posted to the official Facebook page of the town’s Emergency Management Notifications system.