Man-of-War are washing ashore in Destin today, according to beach safety lifeguards.

"Their air sacs are usually the size of a man's thumb, but the ones beached right now are much larger, with some the size of water bottles," Beach Safety Lifeguard Christopher Lambert wrote in an email to The Log. "Even though they are dead the tentacles can still sting, so wear shoes."

According to the National Geographic website, "The man-of-war comprises four separate polyps. It gets its name from the uppermost polyp, a gas-filled bladder, or pneumatophore, which sits above the water and somewhat resembles an old warship at full sail. Man-of-wars are also known as bluebottles for the purple-blue color of their pneumatophores."

The man-of-war's tentacles are covered with venom-filled stingers that are used to paralyze and kill fish or other small creates, the site said. For humans, a man-of-war sting can be painful, but they are rarely deadly.

Since they have no means of propulsion, the man-of-war is at the mercy of the currents and drift where the water takes them.