Why would you want to be a mermaid? I don't get it.
You'd have to leave your family, leave your life, and go live in the sea. You can't be a mermaid and just hang out as usual, go to school, live at home, college, career, family, love life, and all.
No boy/girl friends, no computers, no ice cream, nothing, all alone in the sea.
Sorry to feed the whole mermaid spells debate.