You've been a mermaid/man as long as you can remember, it’s just how you were born and it’s how you’ll always be.

You were swimming around the ocean, exploring new places when you happened to see a weird gathering of string on the floor. You went to grab it when you felt something snap and a net closed in on you. Next thing you know you’re brought into the air of a ship where a pirate stands chuckling. ”Well..look at what the..sea..dragged in..”