Please answer the following question: Alabama moccasinshell - The Alabama moccasinshell (Medionidus acutissimus) is a species of freshwater mussel in the family Unionidae the river mussels. It is native to Alabama Mississippi Georgia Tennessee and possibly Florida. It is a federally listed threatened species of the United States.This aquatic bivalve mollusk is about 3 centimeters long with a thin yellow or brownish yellow shell. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Animal