freshwater temperate snails, possibly physa fontinalis search for food on sand substrate bottom near shells of pisidium amnicum

adaptable airbreathing amnicum amphibious animal antenna aqua aquadesign aquarium aquatic background biotope bladder bottom captive clam cleaner clear common conditions controlled crawl creeping dark decorative dirty easy eat ecology essential european fauna filter fishkeeping fontinalis food foot freshwater gastropod gastropoda greater helper hobby keep local macro mollusc mollusks mussel natural nature peaclam physa pisidium possibly protection pulmonate river sand search shell shells small snail snails specimen substrate temperate underwater useful water wild yellow