Here's a link to a post I made a while about sturgeon on display in a huge outdoor pond with a viewing window in their native habitat in the columbia river gorge.But how about the sturgon. It is a really large freshwater fish also. The picture is not of the largest on caught.
http://www.hellscanyontworivertours.com/images/Photo Gallery/Fishing Gallery/pages/Sturgon.htm
Unfortunately Logans Daddy, even the monster sturgeons can no longer be found. The one you are looking at is a baby compared to what is on record for that particular species. There are unofficial records of this ray, but as they say, it "could" be the largest fish on record. It isn't confirmed as the largest. The current record for largest freshwater fish is the Mekong Catfish. Here's an interesting article that explains the reason the sturgeon doesn't take first place!