Badacheonguk Aquarium is a family-run aquarium shop in Busan that sells saltwater fish, freshwater fish, and aquarium supplies together. It stocks several kinds, centered on saltwater fish, and explains care methods and equipment setup from the fish's point of view. There is parking, and the owner and his mother walk beginners through care knowledge and experience point by point. Inside the store, you can take part in mulmeong, watching the fish.