Arubandi07
Contributor
The standard plural in English of octopus is octopuses. However, the word octopus comes from Greek and the Greek plural form octopodes is still occasionally used. The plural form octopi, formed according to rules for some Latin plurals, is incorrect.
octopus: definition of octopus in Oxford dictionary (British & World English)
Funny, I always thought the plural would be 'Octopussi' ...