-This is actually just me giving facts of jellyfishes- Well yes, there are species that can kill someone with just a touch, for example, the Sea Wasp Jellyfish from Australia can kill someone in minutes, that certain specie is one of the most lethal and venomous animals in the world, however, in another hand; There are species of jellyfish that you can eat or that are inoffensive ! for example the Fried Egg Jellyfish, they even filter the water