The Long Kiss

The girls spent their second half of their summer vacation by the ocean, where they met the mysterious girl Mary who turned out to be a princess in an underwater kingdom. There was a fight between starfish and sharks but with W.I.T.C.H. on the opposite team, the latter didn't have a chance. The girls were being victorious with minimum effort and Mareeve was finally free to spend the rest of her days with her mortal boyfriend.