Bill and Russ I agree. That is why I provided the Google list on PS first as it has a lot of pics for comparison. But they aren't always right. I don't really trust the drawings/paintings for as Bill says it is one perspective. They ,in addition to being local, are also subject to the eye of the artist . They are great to look at and good work just not the ideal fish ID source. I suggest that folks look at the Wisc. Fish ID site http://wiscfish.org as those are top notch wet pictures by someone who is very good at fish with good equipment. If you want to compare the fish in Wisc. with those from a diverse area then look at http://www.nativefish.org/Gallery/ and Google to compare. There are other sources but they do not attempt to show M/F nor describe the differences. Only source left is a text search . I do think I can find you some text on PS and snails. Bill will have a much better idea of your snails but posting a pic would help as there are many different ones and all do not host parasites and they do help a lot with pond clean up.