From National Geographic:
February 16, 2007—For a male cyanea octopus, finding a mate is all about showing a little “leg.”
From sniffing the water for female pheromones to baring their suckers to scare off potential rivals, the creatures must make good use of their eight appendages for a chance to reproduce.
Watch a tense standoff between two competing males, and see the victor learn the harsh lesson that getting a female’s attention isn’t the same as keeping it.
The video is here.