Venomous sea slugs have been spotted along North Carolina’s Outer Banks. Known as blue sea dragons, these slugs live in the ocean and occasionally get washed ashore by strong winds. A Facebook post by the Cape Hatteras National Seashore advises visitors to admire the creatures from a safe distance and to be cautious that more could be nearby because they can travel in groups.

Park rangers are telling people who visit the beach there to admire them from a distance and to not touch them because dead or alive they remain venomous.