A cleaning head for a marine cleaning system used for cleaning a liquid submerged surface includes a body configured to be disposed adjacent to and moved relative to the submerged surface during use. The body defines at least one suction aperture being in fluid communication with a suction region adjacent the body. At least one support arm extends from the body, which support arm in turn supports a respective cleaning element including a scraping blade that is configured to cause material on the submerged surface to separate from the submerged surface and become suspended in the suction region during use. The material separated from the submerged surface is drawn away from the suction region through the at least one suction aperture. Each support arm extends flexibly from a respective junction with the body so that the cleaning element is supported in a spaced relation laterally away from the junction with the junction being disposed in an operatively forward direction of the cleaning element during use.