Just watching a documentary on octopus on TVO right now. There was this one lab that had all sorts of critters in it. Well everytime they came in the next day they would find a bunch of crabs in the octopus tank... the crabs are normally housed all the way on the other side of the room. They couldn't figure out what was happening so someone stayed behind with a camera. When they closed all the lights and left, the octopus would crawl out of its tank, across the room, in to the crab tanks, snag a bunch of crabs, and bring them back in to its own tank

Not sure why they didn't have a lid on the tank though? LOL either way I got a little chuckle out of it