Abstract: A skimming system for removing a floating layer from a body of liquid which includes a skimmer for semi-immersion in the liquid having an irregularly shaped hollow interior compartment supported for self-adjustable tilting movement from a recumbent position generally parallel with the reservoir surface to an inclined position admitting the floating layer to the compartment. A self-cleaning assembly operable in response to skimmer movement protects the skimmer inlet from debris entry and includes cleaning fingers cantilevered out from the skimmer over the opening protruding between a grid of upright blocking baffles.