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.
Seaworld Yas Island Abu Dhabi is the best place to meet and have fun with your family. Explore the zero gravity ride which is manta and get to be educated more about the ocean and it's life... Take part now and you won't regret.