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What Are Sand Fleas and Do They Bite?

The common sand flea does not bite at all; rather, it feeds on organic debris that it finds in its ocean home. If you’re in the U.S. and encounter a biting insect on a sandy beach, you’re likely crossing paths with a sand fly, or more rarely a chigoe flea, rather than a common sand flea. Sand flies are insects that are commonly found on U.S. beaches. They do feed on human and animal blood. These insects are likely the responsible party if you find that you have an itchy bite after a beach day. Due to their ability to spread disease, sand flies are considered a health concern.

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 Sand Fleas Are Real! (But They’re Not What You Think They Are…)

If you want to go to the beach, and you Google, say, sand fleas, you’ll very likely read articles that will keep you away from the beach for good! So allow me to fill you in... They are scavengers that feed on rotting organic matter, so a nice pile of washed-up seaweed looks really good to them. They can hop, but that’s where the similarities with actual fleas begin and end! They do not suck blood, and in fact they want nothing to do with you. If you approach them, they will jump away, the obvious origin for their common name. in on some of these mysterious critters that call the beach home.

Articles of Interest

How To Avoid And Treat Sand Flea Bites

Traditional bug spray tends not to work on sand fleas. If anything, it just seems to make them friskier. Rather than slather on the DEET buy yourself a bottle of oil to rub on instead. This will help ward them off and place an unwelcoming barrier between the fleas and your feet. You can buy insect repellent that says it works against sand fleas, but you’re better off just going straight for oil instead.

What is a Sand Flea, Exactly?

Many people love going to the beach to spend time in the sun, sand, and water. But they might not love some of the nuisances that live at the beach or in the ocean, such as gnats or jellyfish. But, what about the sand flea, a small critter that can be found in moist areas such as under rocks or debris... Sand fleas jump like fleas and are difficult to capture which may be how they got their common name, not because they actually bite people. Their common name answers this question: sand fleas live in sand. More specifically, sand fleas live on sandy beaches near the high-tide mark. They are most active at night, when they’ll emerge to forage for food. During the day, they’ll stay buried in the sand.

Sand Fleas: What Exactly Are They and Do They Bite?

Contrary to popular belief, they don’t bite you since they are not insects but are actually related to crabs and lobsters instead.

Weekly “What is it?”: Sand fleas (mole crabs)

Biologically, these 10-legged crustaceans are important building blocks of the nearshore coastal ecosystem. Occupying the high-energy swash zone of the beach where waves constantly crash in, they are quick burrowers who hide in the wet sand. They burrow and swim backwards, using a body part located on their undersides, called a telson, to dig.

What Are Sand Fleas?

Sand fleas—scientifically called Tunga penetrans and known by other names like niguas or suthis—are parasitic insects that are extremely rare in the US. You might notice sand flea bites that look like a cluster of small red bumps on your skin when you're bitten.

What Do Sand Fleas Look Like?

Sand fleas have a specialized appearance that suits their habitat, with a flattened body, long antennae, and powerful hind legs for jumping, all of which help them thrive in the sandy beach environment.