Is the plural of Octopus, Octopi or Octupuses?

The problem is, octopus derives from Greek. The i was a mistake, but so many people adopted it that it became an acceptable alternative. Many people don’t like octopi, and you will rarely see it in edited works, but it does occasionally appear. read more

Octopi vs. octopuses Octopi, the supposed plural of octopus, is a favorite among fans of quirky words, but it has no etymological basis. The form was created by English speakers out of a mistaken belief that octopus is Latin and hence pluralized with an -i ending. read more

USAGE The standard English plural of octopus is octopuses. However, the word octopus comes from Greek, and the Greek plural form is octopodes. Modern usage of octopodes is so infrequent that many people mistakenly create the erroneous plural form octopi, formed according to rules for Latin plurals. read more