The Shape of Water is a beautiful, entertaining film by the Mexican director Guillermo del Toro. The film is his take on many monster movies of the past, most prominently The Creature from Black Lagoon. The film features excellent performances from Sally Hawkins and Michael Shannon.
But 13 Oscars? Seems like it is just one of those feel-good auteur pieces that the MPAA members go nuts about from time to time - Shakespeare in Love, The Artist and La La Land immediately come to mind.