Aquatic snails

from the top

a member of the genus Physa, which are difficult to identify to species from the shells,

a juvenile Goniobasis lavescens,

and a juvenile Valvata tricarinata.

Below and to the right is part of a Zebra Mussel,
Dreissena polymorpha.

Detail from "Drifted Lake Erie 1993"

watercolour by Aleta Karstad

[Aquatic snails]

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