This is the 3rd year I've had them Tim, and every batch acts different. Normally, I catch some advanced fry in the fall and keep them in aquarium over winter, generally 3-5" by the time I can get them out. This year I ran across some adults I went and picked up, these are quite a bit bigger than what I normally grow-probably 8-14" so I may have started the problem without even realizing what I had done.