Octopi

Saw the coolest thing on TV. This guy put a freshly captured octopus (A) in a tank with a crab in a clear plastic box. The octopus didn't even try to get at the tasty morsel. Then, the guy put the crab-in-a-box in an adjacent water tank with an octopus who had figured out how to open the plastic box, which he did immediately, and happily crunched on the little crab. Octopus A jumped to the side of his tank with a WTH look in his bulbous eyes. When the guy gave him another chance at the crab-in-a-box, Octopus A was on it like he had seen Octopus B do...and was able to pop a cover and get at the crab. Amazing.
I can't look at octopi on a Chinese buffet without thinking that maybe we shouldn't be eating something that teachable.