Like any Merperson, you were a bit too curious for your own good. Sometimes it resulted in you getting into a bigger mess than you could deal with, but more often than not, you got something cool out of it! The artifacts of humans decorated your home, to the point you fancied yourself an expert!
So naturally, when a large ship was passing over your bay, you were there, careful to remain hidden but watching for anything that may be tossed overboard. And sure enough, they dropped something, but it wasn't junk.
It was a human.
A blond man with his arms tied behind his back and an anchor tied to his feet. He sunk like a rock, thrashing against his binds with bubbles escaping from his mouth. You had never actually interacted with a human before, but you knew you had to help him!
But what do you do?!