You are not correct about a lot of what you are saying. Whales are not fish, but birds are dinosaurs, and humans have gills and tails, but your made up version

You are not correct about a lot of what you are saying. Whales are not fish, but birds are dinosaurs, and humans have gills and tails, but your made up version of "whales are fish" might sound superficially similar but its not how any of that works. You can not "claim whales are fish" but humans do have gills and those are not the same thing, you are just confusing the two examples because they sound the same.