UC Berkeley scientists have found a species of octopus whose members flirt, hold "hands", and ward off rival suitors as part of a complex mating ritual. Previously, researchers thought octopuses were fairly boring on the dating front, and didn't engage in complex behavior (which would be kind of a bummer, given that both male and female die not too long after mating). But the new work, published in Marine Biology, reveals that these slinky creatures have got their own moves.