As the biggest seaport in Korea, Busan has an abundance of seafood. Seriously, if you prefer your fish then Busan will be a playground in your case, each number of metres is a seafood restaurant with substantial tanks bursting with species like Crab, Hagfish and Flounder. Take a look at https://busannightactivities22109.dailyblogzz.com/37290566/summer-holiday-haeundae-can-be-fun-for-anyone