<p>The venomous blue-lined octopus is one of many species that engages in sexual cannibalism. </p> <p>The post <a href="https://www.popsci.com/science/blue-lined-octopus-sex/">Male octopus poisons its mate to avoid becoming post-sex snack</a> appeared first on <a href="https://www.popsci.com">Popular Science</a>.</p>