Public domain photos

The image shows a collection of arca barbatus, a type of freshwater mussel, on a black surface next to a book. The mussels are arranged in a neat pile, with some of them overlapping each other. The book is open, revealing a page with text written on it.

The image shows a collection of arca barbatus, a type of freshwater mussel, on a black surface next to a book. The mussels are arranged in a neat pile, with some of them overlapping each other. The book is open, revealing a page with text written on it.Open in library