Goldfish Aquarium is a nice screensaver which allows you to decorate your screen with lovely tanks. You will be able to select the fish you wish to see in your tank or simply click random and you will see all of them. All fishes have a description which include the name, color, guanine, fin, and ornamental, and there's a picture of them, so you can see what they look like. They are all very colorful and cute. The trial version only includes three fishes and unfortunately, you won't be able to change the settings.
Moreover, the screensaver offers lots of tanks to choose from. If you wish to see all of them, you simply have to check them all and they will be randomized. You will also be able to customize the light, bubbles frequency, debris, and the tank cycle time. In addition, the screensaver includes water sounds, and you can adjust the volume or turn sounds off. The screensaver can be seen in full screen and you can select the layout (best fit, wide, or normal). Sadly, you cannot add music.
In short, if you are looking for a nice screensaver to give life to your screen, Goldfish Aquarium may be a good choice.