It would be a great addition to have a fish that is specific to each month and can only be caught during that month. The fish could be designed to look like what that month represents; like September would be a leaf of different colors, December would be a snowball, January a rain drop, October a mud puddle, November a lightening bolt, February a storm cloud, etc. Making it epic would be a nice challenge but also adding an incentive of a prize of fishing elixir or being able to fill up your energy when it is empty would have everyone running for the water!