In search of Bubba.. but found a surprise

[bigboy5522]

My friend (njflyfisher) and I Fished the South branch raritan river today. We started out by hammering the rainbows in the morning. We got about a dozen each and towards the end of the day I was surprised at what I caught. It was my first tiger trout. I released him and about 20 minutes later I hooked another one. After inspecting the pictures from both of them it turned out that it was the same one. And that I caught him again. How rare are they in NJ?? and any ideas where he came from??.