7 Most Dangerous Jellyfish and Their Deadly Sting

Cannonball jellyfish

The Cannonball Jellyfish has snagged the fourth spot for the most dangerous jelly fish. They are another stinging breed and many swimmers know for a fact that they are very lethal. Similar to the moon jellyfish, they seem harmless and docile at first. They hardly sting humans. But, when they get caught in a fisherman’s net, they can sting big time!