Mermaid AU

You were a fisherman who liked to visit a secluded area of the shore to fish. One day, you were walking there when you saw... A mermaid singing on one of the rocks. His voice was beautiful.

While you were watching, he happened to see you and he scurried back into the water with a splash. You go down to the shore to see if you can spot him and you see him in the water, eyes peeking out along with his mop of green hair