Its a 'biorb life30'
the company that makes them have a range of different aquariums
i have a baby biorb (15 litres / 4 gallons)
They are really cool, and super easy to look after. they have a built in airpump which pushes the air through the tube in the middle and the water is moved around in a big circular motion in the tank, which pushes all the yukky stuff into the filter, which is at the bottom of the tube.
to clean it, you replace the water, and twist the tube & filter out, wash it and put it back in... or you can buy new filters for about $9 and put a new filter in each time.