I think it's a must to have a section dedicated to public aquariums in mondo.Monterey Bay Aquarium is one of the most beautiful and popular of the world. In Italy we have some, surely the most famous, rich and fascinating is the Aquarium of Genoa. But if you were in the U.S., perhaps on the west coast, you could slip aa few miles south of San Francisco (beautiful!) and pay a visit to Monterey, a small quiet coastal village, motivated mainly by his own public aquarium, the Monterey Bay Aquarium.
During my honeymoon we are clearly past "by accident" ... joke, loved it to my wife, despite everything.
Worth a visit especially for the great vascona "final", very dark but very effective because of the huge fish in it and by the absence of any disturbing element. A tank simple, minimalist, but with a strong emotional impact.
And then the section JELLYFISH, dedicated to jellyfish. I do not think there is other in the world so rich and well made. For me it was truly an unforgettable experience, maybe because they are animals that are never seen in captivity and also from the truth is rather difficult and even dangerous to see a lot together. Interesting for those with children is the opportunity to participate in snorkeling with lots of mini-bottles and dry suit, the mini-bay within the aquarium. And 'the outside, is connected with the sea, but is accessible only to customers of' Monterey Aquarium.

The official website, however, this is beautiful and full of information on the species housed, but also on the activities in which the public aquarium is involved.

In late ... I know ... are sensational late BUT, the show is not over yet so I have a half an excuse.
In Florence, in the Museum of Natural History, from 5 until 8 May and June there will be an exhibition titled "Under the sign of Pisces"
Here's the poster of the exhibition at the Museum of Florence:

The shows have not seen it, but I read that have been re-created the following water systems:

1) South America, Amazon River - flooded forest (varzea)
Reproductive strategies and parental care Livery and intraspecific communication in the dark waters
Fish: Dwarf Cichlids and Characins

2) South America, the Amazon river
Tactics of the bench
Fish: Piranha

3) Central America, Mexico - Rivers
Reproductive strategies and ovoviviparità
Fish: toothcarps

4) East Africa, the Great Lakes region (Malawi)
Geographical isolation and speciation adaptive radiation, dietary specializations and trophic niches
Fish: Cichlids

5) East Africa, Somalia - subterranean habitats
Morphological and physiological adaptations to life underground
Fish: Phreatichthys

6) West Africa, Congo River (yaèrè)
Convergent evolution of different species, African and American
Fish: cichlids and characins

7) Southeast Asia, Thailand - Pozza internal
Adaptation to anoxic
Fish: Anabantidi and Belontidi

Asia (southeastern coast), Oceania (the north western coast)
- Mangroves
Adapting to changes in salinity adaptation to life in subaerial Perioftalmi
Predatory strategies
Fish: Toxotes, Scatophagus, Periophthalmus

9) Oceania, Australia - Northern Rivers
The Rainbowfish
Fish: Melanotaenia

10) Europe-Italy Arno River
The aliens among us ...
Fish: catfish, bluegill, carp