This was our Memorial Day trip. It was another holiday so of course everywhere you go, the place would be packed with people. This aquarium is just a small portion of the COEX mall. It's not big at all... especially when you're with 60 million other people. It had a lot of very interesting presentation: they've used a fake phone booth, some appliances and musical instruments to showcase their sea creatures.
Entrance fee was 15800Won.