Would anyone recommend the Aquarium in Barcelona? it is not mentioned much, but has good looking website.
My 18 year old son and I went last week. He has an interest in marine biology, so it was pretty cool for him. I enjoyed it as well. There is a lot to see and the tour takes you under the tanks so you get to see the fish and sharks from underneath. I would recommend it.
It's a nice aquarium and worth your time. It's also a pleasant walk to get there via the Ramblas.