PITTSBURGH (KDKA) – A number of highly venomous relatives of jellyfish have been spotted both in the water and washing ashore in a popular vacation spot for Pittsburghers.

According to a Facebook post by the South Carolina Department of Natural Resources, a small number of Portuguese man-of-wars have been spotted on South Carolina beaches.

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The Department of Natural Resources advises that you should keep an eye out for these creatures both in the water and on the beach.

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They say that even a dead man-of-war has a sting that might be strong enough to send you to the hospital.

(Photo Credit: South Carolina Department of Natural Resources/KDKA)

Luckily, they’re easy enough to spot.

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They have a distinct bright blue top, or “float.” So if you’re heading to South Carolina this summer, keep your eyes open for any flashes of neon blue.