"Irukandji jellyfish's stings are so severe they can cause fatal brain hemorrhages and on average send 50-100 people to the hospital annually."<p>"Researchers found that vinegar promotes the discharge of jellyfish venom. "You can increase the venom load in your victim by 50 per cent,""<p>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?