Happy Aquarium seems to have started a new tradition of rolling out a new in-game "Demo Tank" each week. Today, they've launched a UFO theme using a combo of regular and specially priced items. Stuff ...

That gorgeous vista you're seeing in this week's new Happy Aquarium demo tank is called the "Emerald Isle" and goes for 36 Pearls or 30 Facebook Credits, which is a moderate pricing as far as tank ...

Every week brings something new at Happy Aquarium, but it seems that last week, the game decided to return their UFO demo tank to the mothership early to showcase their new Baby Playtypus and a few of ...