"The dromedary naiad or dromedary pearly mussel (Dromus dromas) is a rare species of freshwater mussel in the family Unionidae. This aquatic bivalve mollusk is native to the Cumberland and Tennessee River systems in the United States, where it has experienced a large population decline. It is a federally listed endangered species of the United States.This mussel is yellow-green in color with interrupted green rays on the shell. The nacre is white, pink, or reddish."@en . . . . . "Dromedary unicornia"@en . "CR" . . . . . . "IUCN2.3" .