I found this on the net, if that helps. I had the same game but never played it. I think my game went to the Amity box years ago
Hope that helps you out.
The object of the game is to proceed from the marina, trying to avoid the Red Hazard Squares in the channel on the way to the Lake where you will fish.
The Lake consists of the six fishing areas, as related to actual Walleye fishing. Here each player can participate in simulated angling.
Each player or team is required to catch one weighted Walleye in each of the six areas before returning to the marina on their way back players try to finish first avoiding the Red Hazard Squares, as well as the Special Weight Deduction circles.
The tournament champion is the player or team which holds the greatest total weight for their six Walleye.
(Taken from the back of the box)