A proposed bill would regulate the size of rollers, or "rock hoppers," used in commercial trawling gear, effectively protecting species that thrive in areas with rocky, uneven bottom, as well as the structure of the seafloor itself. Congressman Joel Hefley (R-CO) filed the Ocean Habitat Protection Act (HR 4003) for inclusion in the reauthorization of the Magnuson-Stevens Sustainable Fisheries Act. "Rock hopper" is a term for a type of trawl net that was developed to fish areas of uneven, hard bottom and vertical structure where conventional trawl nets would become entangled. According to the Recreational Fishing Alliance, these nets have also been shown to damage the bottom where they are fished. The Ocean Habitat Protection Act would regulate the size of these rollers and protect fish habitat.