The amazon is filled with all kinds of river monsters that could give anyone nightmares. The Piranhas are among the most famous ones, but there’s a bigger, more frightening monster swimming in the Amazon River. The locals call it the Arapaima. They are these long sleek looking fish that can grow up to more than 8 feet. Their bodies are covered with these amazing armor-like scales that are not only beautiful but also very strong. In fact, the scales are so strong, not even a Piranha bite through them. Here’s more about this awesome creature: