FishBowl Live Wallpaper - Version 3.1 has been released on Android Market.
Check it out here: https://market.android.com/details?id=com.sp.fishbowl
New in this version is the ability to choose how often the fish can have babies.
Now you can set it so that babies appear over a few days, rather than all within a few minutes.
Want more features? Try FishBowl Premium LWP.
Want even more features? just ask. :-)