I'm not sure if this is the answer you are looking for but, I hope it helps anyway! Fish Tycoon comes in various degrees of difficulty (You can change that via the options menu for each player.) Aside from that- In each game that you are playing you can purchase two additional levels of food, environment and advertising research to improve upon the basic levels you start out with. You can also buy many other items to add to your tank for various reasons. All of which will alter your game on one "level" or another
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Have you hugged your Golden Grouper today?