Winnipeg Physa Snail

Winnipeg Physa Snail
Latin Name

Physa sp.

Group Name



This snail appears to occur only in Lake Winnipeg. The Lake Winnipeg Physa is found in shallow water (less than 1 m deep) on medium to large algae-coated rocks in windswept areas close to shore. The lake bottom is typically gravel, sand and rocks.

Species Description

The Lake Winnipeg Physa snail has a flattened globe-shaped shell that makes the snail appear relatively wide. The fragile shell, which is usually less than 11 mm in length, is a dull bluish-grey colour and often pitted. Living snails have light grey skin marked with a few black spots. The snail has an extremely delicate shell, and frequently does not live for more than one year.