American Bladder Snail - Physella acuta

    Alternative names
    Physa acuta

    Up to 18mm long with a pointed turret and large flared mouth which joins the main shell at close to a right angle. As with other Physa species it is sinistral

    Similar Species

    Physa fontinalis has a much less pointed shell and the mouth joins the main shell at an acute angle.

    Identification difficulty
    ID guidance
    • sinistral (left hand coil)
    • large flared mouth - joining at nearly a right angle

    Rivers and lakes, can tolerate some pollution.

    When to see it

    All year.

    Life History

    This is an introduced species. It feeds on dead plant and animal matter, rather than algae which most snails feed on.

    UK Status

    Widespread and relatively common particularly in the south.

    VC55 Status

    Uncommon and/or under-recorded.

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    Leicestershire & Rutland Map

    MAP KEY:

    Yellow squares = NBN records (all known data)
    Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

    UK Map