Interesting history of the PS in your pond. Keep us updated as the pond progresses. Note this summer if you catch some that are even more colorful than that one in your picture which may be a hybrid. the Pure stain ones should be similar to those you originally stocked. Normal pure strain PS will have a red spot on the margin of the "ear tab" as in the fish of these links. Watch for it in your fish.
http://fishndave.blogspot.com/2013/07/nesting-pumpkinseed-sunfish.html
http://thenativetank.tumblr.com/post/117114965784/cool-critters-pumpkinseed-sunfish-lepomis
http://www.roughfish.com/content/sunfish-pumpkinseed-clint-texas
http://www.bigstockphoto.com/image-1734121/stock-photo-pumpkinseed-sunfish

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