I visited the place with high expectations because...

I visited the place with high expectations because I heard it was very beautiful. It is a nice aquarium with a lot of information about different kind of fishes. The big aquarium is really nice you can just stand and look while you are on the 'conveyor-belt' . It goes around half of the aquarium and after there is a part in the middle where you can sit.
In the end I would say it is nice to visit it. But the price is a bit expensive, so if you are for a few days in Barcelona I would advise you to visit something else. If you are a student if you have an International Student Identity Card (ISIC) you will get a 10% discount.