Main tanks are well designed to watch helicopter view, normal view, and underwater view!
Seals and flamingos are awesome!
But compared to other aquariums, it is hard to mention what is the representative animal to watch.
E.g) sharkwhale at Okinawa, killer whale at Moscow
The oceanarium is really big, but it's big because of walls and area primary not fishes. Also, it has a good variance of species. The penguins were great at minus 1. Moreover, it has the greatest rollercoaster, it's really scary.