HOW would you like to take some fish food, stick your hand right into the water through a hole in the wall of the aquarium and feed the fishes?
In case you didn't know, you can do it at Sentosa's Underwater World.
There is a hole in the wall of the fish tank, like you have at a money-changer's counter. You slide your hand in, but amazingly, no water flows out.
It is called the Mystical Anti-Gravity Interactive Concept Tank or Magic-T and is billed as one of the complementary attractions to the Touch Pool, where visitors are allowed to touch some marine life.
'It's amazing and crazy, with all these fishes nibbling at your fingertips,' said 12-year-old Grace Norris from Gold Coast,Australia.
Although she lives close to Sea World, she and her mum have never seen a tank like this.
So what's keeping the water from gushing out?
'Magic-T is actually a vacuum tank,' said MrRoy Yeo, assistant curator at Underwater World.
'An air-pump sucks out air, creating vacuum inside the tank, maintaining enough low pressure to keep the water from gushing out.'(See graphics).
The Magic-T has been here since 2007.
There are two Magic-T tanks. One is for fresh water, with Blood Parrot fishes and the other is for sea-water with Damsel and Yellow Tang fishes.
Fish food can be purchased at the vending machines nearby for $2.
