Freshwater Nerite - Theodoxus fluviatilis

    Alt Name
    River Nerite

    Shell size 4 to 8 mm. The shells are very attractively and highly patterned but are very variable in appearance, usually having a combination of creamy white and dark browns.

    Identification difficulty

    Found in lakes, rivers and streams – even in slightly brackish water.

    When to see it

    All year round.

    Life History

    This species is an algae eater.

    UK Status

    Widespread and fairly frequent in central and southern England, less common elsewhere in Britain.

    VC55 Status

    Uncommon, or under-recorded, in Leicestershire and Rutland.

    Leicestershire & Rutland Map

    UK Map