Funny. I saw this thread just after I posted a pic of a crucian (?) on HYDGO. Now I look again, its length to depth proportions and the depth of the fork in the tail make me wonder. They certainly did the well-known crucian fight - round in circles jagging the rod down, a few dives, then suudenly popping up flat to be netted. If I'm wrong about these fish, I'm probably not the only one - the fish in this pool have been in a few press features over the years before Dave Coster mentioned them on here lately. I kept the article from when I first heard of the pools years ago, and here's the well-known angler in the Mail feature with fish that are shaped like mine.