“You're living every little girl’s dream,” a young character in *Scales: Mermaids Are Real* (2017) is told. Her name is literally Siren (Emmy Perry), and she's informed, “You’re officially a mermaid, honey!” I have to wonder though; wouldn’t most little girls prefer being a princess or something? Becoming a strange creature sounds more like a nightmare. Do many young children watch *The Fly* and wish that would ha…