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I love aquariums. I went to Seoul last Septmeber and visted the Co Ex Aquarium. This aquarium is inside the Co Ex mall which was quite interesting.
The Aquarium is a decent size. What interested me the most was that they used many different objects as fish tanks such as pop machines, toilets, tvs, computers etc. It was quite amazing. They even had two manatees there but the space was limited and I felt bad for the poor things. They had a section where there were starfish out in the open and you could just touch them and grab them. I felt bad for the starfish because there would be these bratty kids throwing them back in the water. It was a good experience and I would definitely recommend anyone to visit this aquarium.
These photos are mine so please do not steal.