Given that “fish” isn’t a biological term, its just a catch all for everything we gesture at when we say “fish”, yeah, this totally checks out
This is the exact opposite of the Catholic Church in the Middle Ages categorising beavers as fish so they could eat them during Lent.
According to evolutionary taxonomy nearly all vertebrates are fish because they evolved from fish and thanks to cladistics everything is still a member of that grouping
Also Capybara got the Catholic treatment that beavers got too
