There was an article in STS magazine about the all-tackle world record steelhead that Bob mentioned. It was 42 pounds 2 ounces caught by eight year old David White off Bell Island,Alaska. It was blind in one eye and the damage to the eye extended to the pituitary gland causing the fish to never sexually mature. Evidently the fish never got the urge to head back to the river to spawn and just swam around eating and growing until it got caught.