Language Tips: Plural Forms Of Octopus and Jellyfish

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56Which is correct, octopi or octopuses? How about the plural form of jellyfish? Is it jellyfish or jellyfishes?

According to, the correct plural form of octopus is octopuses. gave this explanation:

“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 is mistakenly formed according to rules for Latin plurals, and is therefore incorrect.”(source)

Octopus by ksly4ever



As for jellyfish, according to, the plural form can either be jellyfish or jellyfishes. stated that, collectively, we say jellyfish. However, when referring to two or more kinds or species, we say jellyfishes.(source)

jellyfish - coloured by frankes


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