Sorry for the confusion...Awesome response by all to protect our fishery!! I do have a question...Don't they do as much damage as the zebra mussel?

Asian clam (Corbicula fluminea) is an invasive bivalve species that has spread rapidly in lakes, canals, streams, rivers and reservoirs throughout North America. Asian clam was first detected in the Western United States in 1938 and is known to aggressively out compete native invertebrate communities, limit phytoplankton biomass, biofoul water intakes, alter benthic habitats, add biologically available nitrogen and phosphorus to systems, and impact aesthetic and recreational values of public beaches, lake front properties and swimming areas.

Their high rates of filtration, metabolism, reproduction, tolerance to wide ranges of habitats, and juvenile dispersal allows Asian clam to aggressively expand ranges and to rapidly re‐invade areas; limiting management, reducing restoration efforts and impacting native benthic communities. Asian clam are capableof both filter feeding (feeding from the water) and pedal feeding (feeding directly from the sediment). One reason for why Asian clam is successful in so many different environments is that it can effectively filter phytoplankton and bacteria out of the water column and feed from the sediments when food from the water column becomes scarce. In Lake Tahoe they grow to be as large as 28 millimeters, but in other warmer systems can be as large as 55 mm. They are found in water depths of 5 to 250 feet (2 to 80 meters), and within the sediments buried in up to 7 inches below the surface.