Exploring the Fascinating Minds of Octopuses The original plan was to observe how 2 aggressive octopuses would behave when placed in the same tank, separated by a protective glass divider. That’s Manny on the left, and Lily on the right. Two of the most aggressive octopuses under Octolab’s care. We expected full on aggression at both ends of the tank. All precautions were taken to ensure the safety of our octopuses. and then it happened…. Manny was falling for Lily! We realized things took a turn when he started flashing his gorgeous colors and displaying the underside of his tentacles to identify himself as male. There is a very narrow gap between the divider and the aquarium glass. Just enough for an arm to squeeze through oops…I should have knocked Manny is being cautious. When mating, male octopuses are at risk of being strangled and eaten by the females. Success!