How dangerous are jellyfish?

Vinegar is a weak acid that might keep the stingers from firing for some kinds of stings (especially from dangerous types like box jellyfish). Rinsing with cool fresh water can make more stingers fire. Also, rinsing a sting with seawater had been thought to prevent them from releasing more venom. read more

Most Dangerous Jellyfish 7 November 25, 2013 For an animal (just) that is 95% water, has no brain and eats / defecates out of the same opening the jellyfish have a surprisingly complex and effective weapon at their disposal. read more

There are many varieties of box jellyfish, all of which can be quite deadly. Aside from box jellyfish though, as you can see, there are really not many dangerous jellyfish. There is the Man o’ War (which barely counts), and the Sea Nettle and Lion’s Mane jellyfish, but other stinging jellies like the Moon and Cannonball are relatively harmless. read more

There are several jellyfish species whose stings can have varying effects on humans, capable of causing mild to extreme reactions. There are several jellyfish species whose stings can have varying effects on humans, capable of causing mild to extreme reactions. read more