The plural of octopus.

Killing myself laughing at the Merriam-Webster "Ask the Editor" feature on the plural of octopus (which I would link to, if I could find a way to do so). Apparently, if you say "octopuses" you are correct; if you say "octopi" you are sorta correct, but have no grounds for telling the people who say "octopuses" that they're wrong; and if you say "octopodes" (which the girl has pronounced most unlike the classical Greek that I was taught at school), you have to "be prepared to deliver this spiel at a moment's notice and in a British accent". Funnily enough, those are both things I specialise in... ;)