Words brought into English can use English pluralisations, so you're not wrong if you say octopuses. I think Grammar Girl had a take on this maybe 7 or even 8 years ago by now. These days, I can't see myself getting worked up about it for the sheer fun of being pedantic like I used to.

[–] chatokun@lemmy.dbzer0.com 6 points 4 months ago

It's not octopuses that octopodes corrects, it's octopi. Octopi is a Latin pluralization, and since the word is Greek and us to i isn't specifically American, I agree with you that octopuses is fine but not that octopi is fine.