Uncisudis advena is a species of barracudina. It is found in the western-central Atlantic Ocean, and from the eastern Gulf of Mexico off the coast of Florida.McEachran, J.D. and J.D. Fechhelm, 1998. Fishes of the Gulf of Mexico. Volume 1: Myxiniformes to Gasterosteiformes. University of Texas Press, Austin. 1112p.
Description This species reaches a length of .
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