Superfamily Acroloxoidea Family Acroloxidae Acroloxus lacustris Shell capshaped.8,5mm long,4mm wide and 2 mm high.The body of the animal is dark. They feed on algaes and rotting plants in canals and lakes.The snails live on waterplants,dead leafs and rocks.They prefer warmer water. From southern Scandinavia to Europe and parts of Asia.