Due to a dual row of large teeth and a snout like an alligator, these carnivorous fish might be the scariest thing lurking in the rivers of North America. Measuring as long as 10 feet, alligator gars are fish right out of a horror movie. They can even survive out of water for as long as two hours.
Found in the lower Mississippi River basin and in the waters of all the Gulf Coast states, these fish tend to swim near the surface or among reeds where they can ambush prey. Despite their intimidating appearance, they are passive toward humans.