detail of swan mussel, anodonta cygnea, crawling in mud on bottom of pond. freshwater mussel in habitat. mollusc with shell

mussel swan anodonta cygnea mud bottom pond river lake nature animal crawl bivalve mollusc shell trace natural wild wildlife aquatic water freshwater detail closeup pungent odor bait habitat fishery glochidium larva endangered threatened species czech germany netherlands poland sweden slovakia croatia italy denmark great britain ireland portugal hungary austria philippines