Happy Aquarium's UFO demo tank is out of this world!
As usual, you can click on items within "Demo Tank" to buy 'em, but depending on how you want to pay for items, you need to be careful what you click on. For example, the "Waving Alien" can be bought in the demo tank, but if you do that, the game will automatically deduct from your Pearls, even if you intended to use Facebook Credits for a purchase instead. So I suggest you get it from the in-game store under the "Props" tab.
But there's two new items that can't be beat. Keep reading to check out the details and preview pics below:
The most awesome and expensive item, is the "ufo", which can be found under the "Special" tab in the store for a whopping 84 Pearls or 70 Facebook Credits (or US $7)! But it's a fully animated item with blinking lights, swims around your tank, and randomly gives your fish a shake by hitting them with its tractor beam!
For a slightly cheaper option, you can go for an Angler, which unlocks at Level 40, but can be gotten for 51 FB Credits. It makes a cute baby fish, but will grow up with a scary toothy grin and the ability to light up whenever you tap the glass of your tank.