Plážovka vejcorodá (Littorina littorea) na pláži ve Woods Hole, Massachusetts, foto Paul Morris from USA [CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0)].

Plážovka vejcorodá (Littorina littorea) na pláži ve Woods Hole, Massachusetts, foto Paul Morris from USA [CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0)].