Moss Bladder Snail - Aplexa hypnorum


The moss bladder snail shell may vary from pale yellow-brown to a darker red-brown, and is a highly polished shell with aperture on the left side (sinistral) and a tall, sharp spire with nearly flat sutures. The shell may be from 4 to 12 mm in height. The animal is dark grey to almost black.

Identification difficulty
Recording advice

Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed.


Found in and around temporary water bodies, ponds and ditches.

When to see it

Adults may be present at all times of year but less frequent in dry summers when habitat water levels are at their lowest or absent.

Life History

May breed at any time of year when conditions are favourable.

UK Status

Widespread and fairly frequent in Britain.

VC55 Status

Rare or under recorded in Leicestershire and Rutland.

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Leicestershire & Rutland Map


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

UK Map