September 6, 2006—Putting sharks and octopuses in the same cramped quarters of an aquarium tank might seem like a bad idea. Sharks are voracious eaters (related video: National Geographic's best shark moments), and the large fish have been known to munch on the occasional octopus.

Luckily for the giant Pacific octopus in this tank, it's not only equipped with serious camouflage and the ability to squeeze into tight crevices, it also has a few surprises up its tentacles.

Watch footage of the octopus's battle with a spiny dogfish shark, and discover the culprit behind one aquarium's unusual murder mystery.