so without downloading anything, without entering any special codes, i figured out how to control the game clock. Im on a Mac (os-x) and haven't tried this on any other platform. to speed up the growth time and pregnancy time of the fish, simply change the time on your desktop clock, it will not work if the game is on "time stopped", also dont jump ahead to far, make sure to feed along the way. further, dont move the clock too far backwards, to set it backwards safely, simply pause the time first. enjoy.

"Time traveling" is dangerous, not only can it make harm your game (freezing it, ect), but also to your computer (Virus scanners, spy/adware scanners, ect)... So "Time traveling" is not recommended.

in web cversion i dont change my time

I don't change my system clock at all, as Charley mentioned changing your system clock could mess up your computer and games for good.

It's also considered "Cheating"