Mori Tower Panoramic Views and the Sky Aquarium II

I just found out that the Mori Towers observation floor in Roppongi is hosting the travelling display of Sky Aquarium II --- meaning more aquariums of exotic fish in the sky. Normally, it costs only 1400 yen to get up to the 56th floor (or so?), but with the addition of the aquariums, it's now a mere 2000 yen. I'm beginning to think the Yokohama Landmark tower trip was worth the 1000 yen we paid. The Mori towers exhibit is on until Sept 28, 2008, but you should verify first if you're going to go.