Insaniquarium Deluxe features enhanced graphics, new pets, new modes of gameplay, and a new type of currency called "shells". Shells are collected as the game progresses, and they can be used to create a custom Insaniquarium screen saver, to buy bonus pets or to increase the number of pets allowed in each tank. Players must manage a tank of guppies and other aquatic creatures, each stage begins with two guppies in the tank or one breeder which creates guppies. Guppies and other fish drop money, which can be collected by the player and used to purchase fish food and upgrades, such as more aquatic creatures, more filling food, and powerful lasers to repel attackers. Each creature must be kept alive by feeding, whether through fish food bought by the player or other species of fish in the tank. In addition to feeding fish, the player must protect the fish from aliens that periodically enter the tank and attempt to eat the fish. The aliens must be clicked on repeatedly with the mouse pointer in order to defeat them.The deluxe version of Insaniquarium contains eight different aliens, but in the original Java version there are four. Insaniquarium can be played in Adventure, Time Trial, or Challenge mode.
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Source: http://ramadhaniricky.blogspot.com/2011/08/download-insaniquarium-full-version.html