I couldn't get past the plural form of octopus, so...
There are three plural forms of octopus: octopuses [ˈɒktə
əsɪz], octopi [ˈɒktə
aɪ], and octopodes [ˌɒkˈtəʊ
ədiːz]. Currently, octopuses is the most common form in the UK as well as the US; octopodes is rare, and octopi is often objectionable. 4951