On 03/09/2016 02:07 PM, Drew Adams wrote:
> Got it.  Ancient Greek octopus (plural octopodes) is the origin.

But octopodes in English is ambiguous (could refer to octopus or octopod).

> In English both octopuses and octopi are in use.  Octopi, though
> a mistaken creation and less common, is nevertheless loved for
> its quirkiness.  http://grammarist.com/usage/octopi-octopuses/

I'm not a native speaker so I don't really get a say. Still, I hear it often enough and sufficiently many dictionaries acknowledge it that it sounds fine to me :)