Sea Life is a network of aquariums owned by the British company "Merlin Entertainments". They are located in many European countries, but the majority is in Germany and in the UK. All centers are basically the same, but each of them has its own features as well.
For example, Sea Life in Berlin boasts of Aquadom, the world's largest cylindrical aquarium with sea water, opened in 2003. The aquarium is located in the huge hall of the Radisson Blu hotel and has a two-level elevator for the viewers inside. Hotel guests whose windows overlook the hall can observe the aquarium.
As for Hannover Sea Life, it has a rainforest. And Sea Life in Oberhausen is famous because of octopus Paul, who correctly predicted the outcome of all seven World Cup matches of German national team in 2010 as well as the final result.
Getting there: See information at the official website.