Under The Sea (a Destiel/bit of Sabriel fanfic) Mermaid au (boyxboy)

Dean Winchester grew up near and on the seas along with his younger brother Sam, they lived with their uncle Bobby, his wife Ellen and their daughter Jo. Bobby was a marine biologist, Bobby would take the kids with him out to sea. Dean loved the joy of swimming in the great blue ocean, while Sam enjoyed learning more about the creatures that lived under the vast blue water. on one of the trips Dean and Sam encounter the beings that will change their lives.