Procreation Station: What Species Has the Craziest Pregnancy? [LiveScience 2012-06-05]
Credit: Jonpaul Hosking http://www.shutterstock.com/gallery-830581p1.html
Okay, octopuses don't technically get pregnant. They lay eggs. But their reproduction is odd enough to warrant a mention. Male octopuses insert packets of sperm into females with specialized arms called hectocotyli. The female can store sperm until she's ready to fertilize her average of 200,000 eggs, which she then lays and hangs around her den or attaches to the seafloor. She then guards her eggs zealously, aerating them by fanning water over them.