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If you want to be sophisticated, it's "octopoda". Slightly less, "octopods". Correct, "octopuses".

Pluralization of the word "octopus" has been a long-studied topic: https://www.merriam-webster.com/words-at-play/the-many-plura...

> If you want to be sophisticated, it's "octopoda".

Where'd this come from? There is no etymological or other justification for the -a ending. You would expect "octopodes".