shells of the bivalve mollusk cerastoderma, lentidium in the tidal zone of the coast in the lower reaches

cerastoderma lentidium animal animals aqua aquatic biological biology bivalve bivalves black sea conch ecological ecology environment europe fauna flora hydro hydrobiology invertebrate landscape life marine mollusk nature organisms saltwater shell shellfish water world wild wildlife barnacle beach coast edible exposed mussel seafood seaside shore