These interesting and widely feared marine creatures are the free-swimming relatives of corals, anemones, and hydroids—and in the same way that many of these are safe to come into physical contact with, so are several types of jellyfish. More than 150 million jellyfish stings happen in the world each year. Jellyfish are scientifically referred to as ‘Cnidaria’ a group of animal species exclusive to marine environments that all posses cnidocytes which are the specialized cells for capturing prey on the tentacles. Most people don’t know what type of jellyfish has stung them, so first aid needs to … But stings from some types of jellyfish — such as the box jellyfish (also called sea wasp) — are very dangerous, and can even be deadly. Jellyfish stings vary greatly in severity. Stings occur when swimmers or beachcombers come in contact with nematocysts. Many people think of jellyfish as some of the smallest animals found in the ocean, but they really do come in all different sizes.Currently, around 2000 jellyfish types have been documented, but scientists estimate that there could still be over 300,000 species yet to be discovered.That’s a lot of jellies… Depending on the type of jellyfish and how much of the skin touches the venom, the sting can cause pain or other serious health problems. Jellyfish stings are relatively common problems for people swimming, wading or diving in seawaters. Other jellyfish-like creatures, such as the Portuguese man o' war, tend to leave wider marks on the skin and larger areas of redness, swelling, inflammation. Cannonball jellyfish are generally harmless to humans and typically do not sting, but beware that they do have toxins which can cause cardiac problems in both animals and humans. While there are more than 200 species of jellyfish, just six of them are routinely found in UK waters - but all of them can sting. It is important to get medical help if you have severe symptoms after a jellyfish sting. The majority of stings from jellyfish occur in tropical and warm temperate waters. The long tentacles trailing from the jellyfish body can inject you with venom from thousands of microscopic barbed stingers. Most often they result in immediate pain and red, irritated marks on the skin. Some jellyfish stings can be life-threatening. Cannonball Jellyfish – otherwise known as cabbage head jellyfish, these jellyfish have a sphere-like shape with short, stubby arms coming out from a reddish bell. ), and a group known as Irukandji jellyfish that can cause serious reactions in humans. Jellyfish stings can be distinguished from other stings by the narrow trail of tentacle marks they leave. While jellyfish stings are painful, most are not emergencies. It transpires that yes all jellyfish do sting (boy, did I eat my words!). Severity of stings depends on the species of jellyfish, the penetrating power of the nematocyst, the thickness of exposed skin of the victim and the sensitivity of the victim to the venom. YES, all jellyfish do sting! Irukandji-like stings occur in Northern Australia, most commonly due to Carukia barnesi, but cases have occurred less commonly in other parts of Australia and from other jellyfish types. Expect pain, red marks, itching, numbness, or tingling with a typical sting. Ever since the earliest spate of jellyfish sting attacks since November 15 this year, Goa's beaches have reported around 20 jellyfish sting … Species and stings of greatest concern in Australian tropical waters include the major box jellyfish (Chironex fleckeri), bluebottles (Physalia spp. While jellyfish are known for their poisonous stings, there are plenty of non-stinging jellyfish species in the ocean. 10 Different Types of Jellyfish. 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