I was catfishing along the Allegheny River in Allegheny County on Tuesday morning when I observed some 3-4 inch long fish in shallow water. Their size, shape and markings were very unique. I got home to my library and identified them as Logperch. Discoveries like these are so interesting to me because it gets me wondering how many fish species we have on our three rivers these days. Last fall I caught an American Eel at this spot and when I was a teenager a friend caught a 5-inch darter-like fish that we called a "sand darter" for lack of a better name. Does anyone else have experiences with unusual species on our waterways? I remember a survey of Pine Creek in Allegheny County coming up with 24 species of minnows or minnow-like fish.