Portuguese Man O' War spotted on St. Augustine Beach

St. Augustine police are advising beachgoers to watch out for a special ocean creature.

Man O' Wars, the jellyfish-like animal, have been spotted on the beach, officials with the St. Augustine Beach Police Department said Friday.

Photos: Man O' War sightings on Jacksonville beaches 

Man O' Wars have long tentacle strands that reach up to 30 to 100 feet long.

The balloon-shaped animals are blue, violet or pink in color and rise up to 6 inches above the waterline, police added.

The animal, police say, is rarely deadly to beachgoers, but a sting from one can cause welts on exposed skin.