"Irukandji jellyfish's stings are so severe they can cause fatal brain hemorrhages and on average send 50-100 people to the hospital annually."
"Researchers found that vinegar promotes the discharge of jellyfish venom. "You can increase the venom load in your victim by 50 per cent,""
Apparently turtles eat them.
"he captured the tiny jellyfish and allowed it to sting him, his nine-year-old son and a robust young lifeguard. They all became seriously ill, but survived." - why the nine-year old son?