painter`s mussel, partially hidden in sand aquatic bivalve mollusk, filter water, blurred figure of physa fontinalis

adaptable adult animal antenna aquadesign aquarium aquatic biotope bivalve bladder blurred bottom breed captive cleaner clear common conditions controlled crawl dirty driftwood easy ecology essential fauna figure filter fishkeeping fontinalis freshwater gill glass headshot helper hidden hobby keep local macro mollusk mouth mussel natural nature operculum painters partially physa pictorum protection river sand shell silt snail species specimen substrate temperate underwater unio unionidae useful valve vulnerable water widespread