Abstract: A porous, conical structure for submersion in a body of water for rotation by water action. A screw blade in the structure confines as well as propels fish toward an outlet end of the porous structure. A support structure for the porous, conical structure may be embodied in a buoyant platform while a modified form of the collector utilizes a permanent ground supported structure. A receptacle is provided at the outlet end of the porous, conical structure for reception of fish and other collected matter. The receptacle may be a walled structure or the end of a bypass conduit enabling diversion of the collected matter and water away from the body of water. A lift and pivoted bearing permit elevating of porous, conical structure from the body of water.