It was the legislature which decided to shoehorn in a number of definitely non-fish creatures to the definition of fish. There was debate about including butter

It was the legislature which decided to shoehorn in a number of definitely non-fish creatures to the definition of fish. There was debate about including butterflies, and that was before invertebrates were even added! It's...well it's obviously insane, but reading through it I'm kind of persuaded. Sure California legislature, birds are fish. Whatever spares you the trouble of typesetting a new section.