I enjoyed Snek's article about the freshwater clam Velesunio ambiguous.
From the en.wikipedia.org
In addition to the remains, the scientists discovered fragments of cooking pots, tools, spear points, food remains such as freshwater clam shells, and bones of deer, raccoons, and fish.
From the toledoblade.com
The zebra mussel also is a threat to native freshwater mussel and clam species and other aquatic animals.