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CBS News 8 - San Diego, CA News Station - KFMB Channel 8 | cbs8.com

'Mucus Grenades' Explains How Upside-Down Jellyfish Can Sting You Without Contact

Divers can be stung without ever coming into direct contact with upside-down jellyfish due to 'stinging water' surrounding them. Now, researchers have solved the long-standing mystery of how the hazardous waters are created.