It was a fight…man-against-fish. Pocatello angler Mark Adams won and caught himself one heck of a fish story.  The rainbow trout Adams pulled from the depths of American Falls Reservoir weighed in at 34.74 pounds, according to the Idaho Department of Fish and Game, breaking an old state record by nearly 15 pounds. Adams said fishing buddies thought it was a carp when they pulled it from the Snake River into their boat on Monday. Fisheries Biologist David Teuscher told the Idaho State-Journal he was stunned by the sight of the fish, which he's now checking against records from elsewhere in the continental United States.  Teuscher says everybody stood around the trout during the weighing with their jaws open. The fish was just over 41 inches long.