Octopuses often collect trinkets and will plunder coins from ancient shipwrecks to fill their homes with.
Octopuses have been observed learning how to dismantle Lego structures and open child-proof caps on medicine bottles.
Paul the Octopus was so precise in his predictions during the 2010 FIFA World Cup that he received death threats from German fans and had to be offered state protection.
Octopuses are so intelligent, they’ve been known to escape their aquariums and crawl into others in search of food. They’ve even boarded fishing boats and opened holds to eat crabs.