These eight-legged goliaths are some of the smartest animals in nature. Studies have shown that giant pacific octopuses, among other cephalopods, can learn by observation. They can use tools, complete simple puzzles and recognize humans. This is pretty impressive for something that looks like a deflated, red breast implant. Additionally, this octopus eats up to 2% of its body weight daily, ripping apart crabs with its beak or arms. Theyve even been known to attack sharks and sea birds. Whats more astonishing is that no matter how much it eats, it never gets fat. Bring on the Big Burger.
