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How do jellyfish not sting each other?

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Along with this lovely jellyfish photo that she posted to the BoingBoing Flickr Pool, Kate Tomlinson asks, "How come they don't sting each other?" Not a bad question. read more

The process of stinging is much more complex than you might imagine. There are sensory cells which are sensitive to the appropriate chemical signals from their prey. read more

Jellyfish can and do sting other jellyfish, he says, but really only when they're hunting jellies of another species. They don't sting the other members of their same-species swarm. Neither (luckily) do they zap themselves. read more

Stingin cells are activated only if the jellyfish touch and recognize some specific organic compounds; in this way, they don't sting themselves, other jellyfishes of the same species (and probably some similar ones), while can recognize and sting some other cnidarians; however, is possible that the nervous system, in some cases, can choose, indipendently form the specific stinging cell receptions, if to sting or not. read more

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