The Great Pond Snail (Lymnaea stagnalis) is a freshwater snail, often found in ponds in Britain. This species is common and widespread in England, Wales and Ireland, but very local
A large snail, reaching 45mm, but some do grow even larger. This species feeds on algea by rasping with it's tongue. It is often seen floating on the top of the surface of a pond or lake, and will do this to replenish air supply.