I too like the idea of having a setting where you can have your preseleted (or randomized) fish swim off the screen, and replaced with a different fish from another preset (or randomized list).
The 7 fish limit is fine by me. As I like the realisim this gives the tank because it's not too overcrowded.
But it would be cool to have one fish swim off the screen every so often and have a different fish swim back on.
Just my 2 cents... thanks for asking!
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