![]() ![]() The life span of jellyfish varies among species, with some only living a few days, others to a year, and a few up to 20 years. Worldwide fatalities from jellyfish are unknown due to some countries’ lack of a death certificate requirement. National Science Foundation reports that around 20 to 40 people die each year from box jellyfish stings in the Philippines. Once the nematocyst pierces the skin it can enter the blood causing a dangerous spike in blood pressure that can stop the heart. Each cnidocyt contains a nematocyst, which is a tiny dart with toxins ( Read more about how nematocysts work here). There are about 50 species of jellyfish that have tentacles covered in cnidocytes (basically a cell that explodes when touched). Found primarily off the coast of northern Australia and in the Indo-Pacific, the box jellyfish can have 24 eyes and 15 tentacles that can reach up to three meters (10 feet) in length. The deadliest jellyfish in the world is the box jellyfish. ![]() What is the deadliest jellyfish in the world? They are venomous, meaning their toxins are injected, and they use small stinging cells to do the job. Are jellyfish toxic to humans?Īll jellyfish produce toxins with varying levels of “stings.” Only about 2% of jellyfish toxins are seriously harmful to humans. But given that it is World Jellyfish Day, I’ll be sticking with the traditional usage. ![]() While they are popularly called “jellyfish,” many marine biologists prefer the terms “jelly” or “sea jelly” to avoid confusion. NOPE! Jellyfish are an animal in the Phylum Cnidaria and the Subphylum Medusozoa. So, in my pursuit for non-animated, accurate jellyfish facts, I’ve compiled a tidy list of all those questions that have kept you up at night. But alas, Spongebob is an unreliable source to turn to for jellyfish information. Thanks for signing up for Ocean Conservancy emails.īut there are many misconceptions surrounding jellyfish, finding that even my own basic knowledge comes only from a completely healthy dose of Spongebob episodes (did anyone else notice that they’re pretty much underwater bees?). ![]()
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