Ionaspis lacustris
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Ionaspis lacustris 2 Photographed underwater on rock in stream. From Thompson Pass, near Valdez, Southeast Alaska. |
Ionaspis lacustris 3 (sun form) On rock in streambed. Fundy National Park, New Brunswick. |
Ionaspis lacustris 4 (shade form) On rock in streambed. Fundy National Park, New Brunswick. |