Updated on June 8, 2017 at 7:19 AMPosted on June 8, 2017 at 6:42 AM


NJ Advance Media for NJ.com

The jellyfish with a dangerous sting that caused a scare on the Jersey Shore last summer, prompting the cancellation of several events, have reappeared in a Monmouth County river, researchers say.

Clinging jellyfish – whose sting can cause “excruciating pain”, muscle weakness and serious medical problems, including kidney failure – were observed and recorded in New Jersey for the first time last June, specifically in the Manasquan and Shrewsbury rivers, according to the state Department of Environmental Protection.

As a result, the DEP and Montclair State University initiated a sampling plan to assess the abundance of jellyfish in New Jersey waters.