Eternal Dream
I've been thinking this for a couple of chapters now but wouldn't it be safer if the girls can convince the government guys to protect him? I mean he's an evolved fish who can communicate so the only thing that the girls would have to worry about, assuming the government is willing to believe a friendly evolved creature exists and they see the value in letting him grow up in peace, is convincing them the fish contains the soul of an human and shouldn't be experimented on. The novel might become a bit boring if the author can't find the right angle so to ensure that it is still fun to read and not just about a fish eating a lot and evolving into a dragon.