As the most important seaport in Korea, Busan has an abundance of seafood. Very seriously, if you like your fish then Busan might be a playground to suit your needs, each several metres can be a seafood cafe with massive tanks bursting with species like Crab, Hagfish and Flounder. Check https://busan-night-activities77764.answerblogs.com/36978975/summer-holiday-haeundae-an-overview