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The arm of this jellyfish sting victim bears an itchy rash.
This is the arm of a boy stung by a jellyfish a few hours before the photo was taken. We got a good look at the jellyfish that stung him. It appeared to be a sea nettle, which imparts a painful sting, but rarely causes any permanent harm.Anne Helmenstine
The Portuguese Man-o-War (Physalia physalis) is a highly venomous marine animal.
The Portuguese Man-o-War (Physalia physalis) is a highly venomous marine animal. It typically has a blue, purple, or pink sail.NOAA
This is a picture of a nonvenomous jellyfish commonly called a jellyball.
This is a picture of a nonvenomous jellyfish commonly called a jellyball. These jellyfish are common off the South Carolina coast.Anne Helmenstine