The largest of all lizards, the Komodo dragon is a mighty reptile that weighs up to 300 pounds and can reach a length of more than 10 feet. This animal takes our No. 6 spot for having multiple predatory advantages: speed, strength and the tenacity to bring down prey species twice its size. They also have a toxic bite; any victim that survives a Komodo dragon attack is likely to succumb to their wounds soon after. Komodos mainly hunt by ambushing their prey, but they are also fast runners and good swimmers. What's more, their incredible predatory skills are matched by an equally impressive ability to consume meat, up to half their own body weight in a single meal.