Report What speices in General Angling Discussion Posted July 17 So I pulled out the Fishes of Missouri 2nd edition to look over this guy again. The first pair was between the quillback and the other carpsuckers (i.e., highfin and river). The features for the quillback were: A lack of a projection on the lower lip - well we can't see the lower lip The upper jaw does not extend beyond the front of the eye - hard to tell from the photo but looks like it might not extend beyond the front of the eye. Quillback had 36 or 37 lateral line scales - this fish appears to have 36 again hard to tell from the photo; the other carpsuckers have from 34 to 36 lateral line scales The length of the snout is about equal to the distance from the back of the eye to the upper end of the gill opening - on this fish the snout is much shorter than the distance from the back of the eye to the gill opening Based upon that last feature, I went to the pairing for the highfin and river carpsuckers. For a highfin the primary dorsal ray is approximately as long or longer than the length of the dorsal fin - it does not appear that on this fish that the dorsal ray is that long For a highfin the standard length (length from tip of snout to the base of the tail (caudal peduncle)) is les than 2.6 times the body depth (distance from belly to top of the back) - for this fish its standard length is 2.26 times its depth The river carpsuckers does not have a long primary dorsal ray and its length is at last 2.6 times its body depth. To me the weight of evidence is that @Al Agnew is correct about this fish being a highfin carpsucker.