With the recent v99E my biggest "wish" so far has been granted, (exit on mouse move) which was irritating before having to either press escape or the M key.
I have mentioned this in an e-mail in passing but I'll put it here as well. It is going to get really confusing (to a non fish expert), when more and more fish become available, (especially if the list above is added), knowing which Fish is which. An icon, (like the Aquarium exe one) next to each fish box that changes to the fish you have selected might be a good Idea or an icon with each fish name so you can see what they are when you are selecting them maybe?.
Other than that and a bottom dweller or two, some alternative background choices and 32bit colour support. Don't want much do I