Male octopuses guided through mating by female hormones

Biologists have discovered that male octopuses rely on female hormones to guide mating behavior, upending long-held assumptions about cephalopod autonomy. Experiments at the Monterey Bay Aquarium Research Institute showed that when female-produced progesterone was introduced to isolated males, their courtship displays increased by 73% within 20 minutes. This chemical manipulation reveals a dependency deeper than previously thought, with males failing to initiate mating without these signals. Compared to #8's fossil findings, which push complex behavior back millions of years, this study highlights the intricate chemical control systems that evolved even earlier, reshaping our understanding of species interaction dynamics.