Was in Seoul for work last week, stayed at the COEX Intercontinental hotel, which is right near the COEX Mall, and the COEX Aquarium (you wouldn't have guessed, would you !) The COEX Aquarium costs 14500won to get in (that's about AU$18), and I probably spent about an hour wondering through the displays. I didn't exactly dawdle - I had some time to kill before we were due to catch our bus to the airport, but I didn't want to be late ! The first part of the aquarium was dedicated to local marine life - and the displays were a little tame in my opinion. It made it a bit less interesting given that the only information given in english were the names of the fish - all the descriptions and details were in Korean. The second part of the aquarium was a special feature on Amazonian marine life - they had a special indoor environment set up to look and feel like you were deep in the Amazon jungle. Quite well done, and some interesting fish. The final part was some of their larger tanks with sharks, and some with tropical fish, and they had the ubiquitous "moving walkway" at one point where you could see sharks swimming all around you. It was a little disappointing - nowhere near as good as many I have seen in other aquariums. Their tropical fish displays were quite good - very bright and colourful. I loved their Neon display, and they also had a tank full of rather hungry looking Piranha which made me feel rather nervous. Good jellyfish displays, several types of eels and morays, and a rather creepy octopus. Overall, I thought it was quite good, but I have been to better. If you do happen to be in Seoul around the COEX area, and have some spare time, you should definitely check out the COEX Aquarium. I will upload some photos when I've got around to extracting them from the camera.