Barely 100 feet off a deserted, coconut-palm-studded beach in Belize, the professor was getting schooled. ''Strip! Strip!'' ordered fishing guide Kachu Marin, crouched next to my friend Mike Traugott on the forward platform of the 23-foot panga. Mike began to strip in his fly line in short, deliberate tugs. Fifty feet from the skiff and three feet down in the greenish-blue water, the tiny fly ...

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