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Limnoperna fortunei (Dunker, 1857) is an invasive freshwater mussel species (family Mytilidae) native to China and Southeast Asia, which has since spread to and across South America and is now a significant cause of biofouling. Its shell is a distinctive golden color with an inner mother-of-pearl layer. It is dioecious and its larvae are free-swimming. As an adult, it typically forms clumps with members of its own species, attaching itself to hard surfaces with its hairlike byssus. L. fortunei is comparable to the zebra mussel (Dreissena polymorpha) in invasive strategy and success; methods of slowing its onslaught on non-native rivers are currently under study.