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PA Species by WatershedS

The PA Species by Watersheds Table (PDF) lists most Pennsylvania fishes occurring naturally in or introduced into Pennsylvania’s major watershed systems. Listings denote any known occurrence.


EN - Endangered

Emdangered icon 

TH - Threatened

Threatened icon 

C - Candidate

Candidate icon 

EN - Believed extirpated (watershed indications are historical occurrences)

Extirpated icon 

DL - Delisted (removed from the endangered, threatened, or candidate species list due to significant expansion of range and abundance)


Lake Erie
Genesee River
Susquehanna River
Ohio River
Potomac River
Delaware River

I = Introduced N = Native N = Present in drainage, status uncertain at this time