Stung by a jellyfish? Don’t pee on the wound. Seriously. Here’s what to do instead.

Erin Jackson was recently walking on the shore near the Cherry Grove pier in North Myrtle Beach when the luster of a washed up sea creature caught her eye.

The pink-and-purple translucent sheen was from a Portuguese man o’ war — one of the ocean’s most distinctive creatures commonly mistaken as a type of jellyfish.

Anyone who spends time on a Grand Strand beach will inevitably encounter a sight similar to Jackson’s.

Here are a few things to know about jellyfish and their close cousins, the man o’ war, which globally sting about 150 million people a year.

1. Let’s get it out of the way. Don’t pee on that sting.

Perhaps one of the greatest urban myths of all time, urinating on a jellyfish sting actually makes things by releasing even more venom into the victim.

The Cleveland Clinic, which Myrtle Beach officials referenced in a recent Facebook post addressing jellyfish safety, offers these tips to alleviate the pain safely.

  • Remove any tentacles immediately, but don’t rub the affected area. That stimulates the venomous barbs even more.

  • Use only seawater to help remove the barbs.

  • Gently scrape the affected area with the edge of credit card or similarly shaped plastic object to remove all barbs

  • Apply vinegar or rubbing alcohol to the affected area. That cuts down on pain and helps release any toxins.

  • Entering a hot bath or shower with water temperatures between 104 and 113 degrees can also help, if you’re able to tolerate it.

2. Most jellyfish found in South Carolina waters are harmless.

Researchers estimate there could be up to 300,000 species of jellyfish - a staggering figure for an organism with no brain, heart or lungs. Most of those are harmless, but the state Department of Natural Resources has identified a few types that swimmers should be on the lookout for.

Cannonball

Although they don’t much more than 10 inches in diameter, cannonball jellies cluster near the coast and in estuaries and can slow down commercial fishing by clogging nets and damaging nets.

Lion’s Mane

Typically active in colder months, it’s saucer-shaped and has up to eight clusters of arms. “Pain is relatively mild and often described as burning rather than stinging,” S.C. DNR’s website says.

Sea Wasp

Also called the box jelly due to its cube-shaped bell, sea wasps are the most venomous type of jellyfish found in South Carolina, with it’s sting sometimes being severe enough to require hospitalization.

Man ‘o war

While mostly found in tropical climates, wind and ocean currents can send them into coastal parts of the state.

Sting symptoms include severe shooting pain described as a shock-like sensation, and intense joint and muscle pain, accompanied by headaches, shock, collapse, faintness, hysteria, chills, fever, nausea and vomiting.

“Initial contact with a man-of-war may produce only a small number of stings. But trying to escape from the tentacles may greatly increase stings. Severe stings can occur even when the animal is beached or dead,” S.C. DNR warns.

3. Sharks get the headlines, but jellyfish are notorious subterranean villains.

The National Ocean Service puts jellyfish on its list of the most hazardous seafaring creatures, joining sea urchins, lionfish, stingrays and sharks.

“These squishy critters injure beach-goers far more often than any other type of sea life. Since a sting from jellyfish tentacles can prove painful even when the creature is dead, smart beach-goers everywhere give them a wide berth both in the water and along the shore,” the agency says on its website.

4. Jellyfish have their own holiday.

If you don’t have plans on Nov. 3, consider using some of the day to learn more about these aquatic wonders. Ripley’s Aquarium in Myrtle Beach has a large exhibit showcasing various species in a sting-free setting.

You won’t see a man ‘o war, but will spot the distinctive moon jelly, which can live up to 25 years.

Scientists believe jellyfish may have existed 700 million years ago, making them older than dinosaurs and trees. They can range in size from microscopic to 6 1/2 feet, with weights of up to 440 pounds.

Oh, and one type of jellyfish might actually never die because of its ability to split cells and clone itself when injured, sick or old.