Merriam-Webster editor Kory Stamper explains the fascinating history behind my favorite hair-pulling, knee-capping Internet debate. Two surprising lessons here. First, all three plural forms of octopus can be considered correct. That's right, everybody. We can stop having this argument now.
Second, and more embarrassingly, it turns out that I've been mispronouncing "octopodes" for years. Whoops.
Hat-tip, Maggie Koerth-Baker.