I liked the story (true, they had it on tape) of the octopus who waited until the lab was closed at night, slid/slithered/slipped out of his tank, crossed the dry table and crept/crawled/corruscated into the tank of live crabs that were his food source, to have a late night snack. The scientists taped this because they thought the cleaners were feeding him but no-one would admit it. They couldn't tell what was really happening because the octopus always did take-away. He WENT BACK TO HIS OWN TANK with the crab before eating.
Very cool animals.