<s>[INST] What is the plural form of the word "octopus"? [/INST] The most commonly accepted plural form of "octupus" in Englsih is "octopuses". While "octopi" is sometimes used, it is techically incorrect because "octupus" is not a Latin word, despite it's Latin origin. The correct pluralization follows the standard English rule for forming plurals by adding "-es" to words ending in "-s", "-sh", "-ch", "-x", or "-o".</s>