Pufferfish
The pufferfish is a curious looking creature that is found in tropical waters all over the world. Also known as a blowfish, this aquatic species is able to turn itself into a ball several times bigger than its usual size, making them virtually inedible to predators. Apart from their elastic stomachs, pufferfish also have a very toxic poison present in their skin which allows them to kill their prey. Its poison is more than a thousand times more toxic than cyanide, although some chefs in Japan cook it, with patrons considering it a delicacy.