
Anodonta californiensis, the California floater, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.

The brother spike is a species of freshwater mussel the family Unionidae, the river mussels. This species is endemic to the Savannah River, United States. It listed as "endangered "in 1996 and was changed due to insufficient information and it has a world listing of "critically imperilled/imperilled".

The Carolina heelsplitter is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae.

Epioblasma stewardsonii, the Cumberland leafshell or Steward's pearly mussel, is an extinct species of freshwater mussel in the family Unionidae.

Lampsilis powellii is a rare species of freshwater mussel known by the common name Arkansas fatmucket. It is endemic to Arkansas in the United States, where it occurs in the Ouachita, Saline, and Caddo River systems. It is one of two mussels endemic to Arksansas, the other being speckled pocketbook. It is a federally listed threatened species of the United States.

Lampsilis satura, also known as the sandbank pocketbook, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. This species is endemic to the United States.

Saxidomus purpurata, or purple butter clam, is a species of large edible saltwater clams, marine bivalve mollusks in the family Veneridae, the Venus clams. It is found in the northwest Pacific Ocean near China and Japan from 0–20 metres deep.