11. Leopard Seal
Cute, huh? No touchy. Seals are large muscular creatures. In their mouths, they have a row of sharp teeth, punctuated by fangs like a dog. They’ve attacked humans before, but only once leading to a fatality. They have also attacked the pontoons of an inflatable watercraft, rendering it worthless to the people inside. How embarrassing to die by drowning in freezing water from a seal biting your boat. Avoid the Antarctic region and you’ll be fine.