a freshwater mussel is a mussel lives in freshwater
freshwater_pearl_mussel is not mollusca. pearly_shelled_mussel is not freshwater_mussel. freshwater_pearl_mussel is mollusca. thin_shelled_mussel is freshwater_mussel. marine_mussel is mussel. zebra_mussel is freshwater_mussel. freshwater_mussel is not mussel. pearly_shelled_mussel is freshwater_mussel. zebra_mussel is not freshwater_mussel. freshwater_mussel is mussel.