Here is what I remember, it has been a few years.Flounder and sea bass could be caught off the southern and eastern coast. Dont know much more than that but, there are a few fishing villages along the coast that people are always willing to help. Northeast of Seoul, up around "Chun chon" (?) there are some lakes and reservoirs but, the fish are tiny. I think the biggest fresh water fish I saw in Korea wasnt much more than 8" long. Throughout the western corridor there are also reservoirs that people fish in but like I said before very small bait (I mean fish). Hope this helps.