A free app for Android, by Just4Fun.

Fish In Phone Aquarium Joke is an entertaining application for Android. With this, you will be able to fool your friends. The app lets you create a virtual aquarium on your phone screen. It contains different types of fish, including goldfish, puffer, guppy, and zander.

This application is a great prank for Android phones. If you are an aquarium lover, you will definitely like this app. You can change the settings to make the fish swim faster, make their movement more realistic, and set the time delay for the animation. You can set an icon for the notification and it will be much easier to prank your friends.