Prettiest Brown Trout in Driftless Area Wisconsin

We finally got in our first trip to the driftless area this week and might add we did very well. We tried a new stream this time which we found to be loaded with brown trout and fished it for a full 6 hour stretch. The thing I noticed on this stream was that these were some of the most beautiful brown I have ever seen in the driftless. As well as being very bright in color, one of the characteristics that made a great number of them stand out was the bright "blood red" accents that ran the entire length of the top and bottom of the tail fin. I have never seen this so much in the Wisconsin browns? Is this a specific strain quality, or most likely a stream specific trait? Sorry didn't get any pictures to post.