Irukandji Jellyfish

The Irukandji Jellyfish the second most poisonous jellyfish in the world, which is surprising because it is only as big as your fingernail! The symptoms of non-fatal stings include  muscle cramps, vomiting, severe pain in the back and kidneys, burning sensation in skin and face, headache, and increased heart rate. These jellyfish live in Australia, Florida, Japan, and the British Isles. These Tiny Jellyfish are only 5 millimeters long with tentacles up to 3 feet long.