What is the form of octopus's?

Answer 1

The plural of Octopus is Octopuses. Octopodes is also acceptable but rarely used. The common misconception that the plural is octopi comes from the incorrect assumption that Octopus is a Latin word, it is in fact Greek.

According to the authoritative Oxford English Dictionary, "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"