How smart are octopussies? Smart enough to learn how to unscrew the cap from a glass jar to get at the crab placed inside in an hour:
How smart are octopi? We taught her this trick in about an hour. First you place an empty glass jar in her tank. Because they are so curious she will investigate it and realize it’s not a threat. Next, you place a crab inside the jar, but without a cover on it. She of course will see the crab and simply reach in and grab the food. Then you place the cover on the jar and barely turn to secure it. She’ll figure out that by twisting the cap a bit it will come off and she gets the food. Finally, you screw the cap on and let her go at it.
Be sure to watch the video at the link above. (Found via Avedon.)