Sickle Darter

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The sickle darter (Percina williamsi) is a recently identified freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is closely related to a well-known darter, Percina macrocephala. Discovered in 2007 in the upper Tennessee River drainage, the sickle darter is around 90.

Percina es un género de peces de la familia Percidae en el orden de los Perciformes.