These two fish were caught on the Schuylkill River in Philidephia. Unfortunately, fading light and limited fishing time made for some god-awful images, so it might be impossible to differentiate between the two. It seems both occur in that river. I likely won't be able to differentiate the two species with these bad pictures, but I thought I'd throw them up here for the experts and see.
I think the only saving grace to ID the first fish is the pigmentation on the dorsal fin. I'm not experienced with what it looks like on spotfin vs. satinfin, but I've read that it is different.
Fish 1:
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DSCF6350.JPG 98.69KB 0 downloads
Fish 2:
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DSCF6366.JPG 87.59KB 0 downloads