8. Box Jellyfish
this is the most dangerous living thing on earth after mosquitoes that transmit malaria of course its venom kills so fast there is nothing you can do just to be safe avoid all jellyfish that you see while swimming in the ocean or the sea it makes you just want to go to the beach now doesn’t it anyway we decided not to tell you what to do if any of the described species attacks you in their own way for only one reason the only thing you can do is go to the hospital immediately even if you don’t think that whatever attacked you is dangerous for your health, see a doctor you know better safe than sorry otherwise the only surefire way to never meet up with any of these critters is ever leave home.