Bluehead Chub, Nocomis leptocephalus, 140 mm SL. Sandy Branch, Travilah, Seneca Quad, Montgomery County, MD - 06/06/18. Collected by Maryland Biological Stream Survey (MBSS). Photo by Robert Aguilar, Smithsonian Environmental Research Center. This species was recently documented in Maryland and is considered non-native. Notice the breeding tubercles on the head, the distinctive pattern easily differentiates Bluehead Chub from the native River Chub.
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