Still, he’s conflicted about his passion. He calls himself a “crooked salesman offering bad merchandise”—if the fish “take what I cast, they will be sorry.” This ambivalence is reassuring.

A chance of a fish even being born with the condition is about 1-in-10,000, a friend told Chrenko, Premier Angler reported. “Being neon orange would make for a tough life as a small freshwater ...