We took the kids yesterday to the Aquarium of Western Australia. What a nice place. I love going to aquariums and have been to quite a few in the states including The Baltimore Aquarium and Chattanooga. This one is small but they have this one tank that is the tunnel tank. I could have stayed in this tank for hours. We actually road the conveyor belt around it 4 times and was there during feeding time. it is a glass tunnel that goes through the tank and there are sharks, stingrays and sea turtles swimming all around you. The kids loved this, including Rose who was fascinated with all the moving creatures. There is a nice little touch tank too for the kids to get soaked in so that would be a nice thing to play at on a warm day.
I would recommend going but it is a bit pricey if you are taking a tribe like us.