The usual plural in English is "octopuses" (pronounced /ˈɒktəpʊsɪz/), but the Greek plural form "octopodes" (pronounced /ɒkˈtɒpədiːz/) is sometimes used, though less frequently than in the past.
[48] The form "octopi", as if the word were a
Latin second-declension noun, is generally considered incorrect,
[44][48][49][50][51][52] but is in fact used, so that it is registered by the
descriptivist Merriam-Webster 11th Collegiate Dictionary, which lists "octopuses" and "octopi", in that order, and Webster's New World College Dictionary, which lists plurals in the order: "octopuses", "octopi", and "octopodes".