KOREAN ENGLISH CHINESE JAPANESE         HomeEcology White Paper of DMZExploration of Imjin RiverWater creature of Imjin River     Features of Fishes in mid and down stream of Imjin river   Imjin river has lots of flood. The major cause of it is that Imjin river is made up with Hantan river, Yonpyoungcheon, Gomitancheon, Yeokgokcheon, Pocheoncheon, Sincheon, and many other rivers and streams. Therefore, during flood, water from those streams and rivers are quickly joined to Imjin river and the water lever of Imjin river increases sharply; it overflows. Since counter-plan for flood in Korea is focused on Han river where many people are living together, Imjin river has been damaged relatively hard by floods. If we look into the cause, we can see that because Han river which is big due to its location where two rivers meet each other flows to the sea easily and it’s relatively hard to flows to the sea for Imjin river; the lingering time in downstream for Imjn river makes the damage of flood in mid and upper stream bigger. Also, since yellow sea which goes to Imjin river has the much difference between the rise and fall of the tide, if water level of the river during fool tide increases, sea water flows backward and it damages more. Due to those flow of water and because it flows along the plain, Imjin river runs slowly from mid-stream. Therefore, because riverbed of Imjin river from mid stream to upper stream is plain it’s mostly made with sand, from upper stream to river-mouth it’s made up with mud flat, and there are a lot of fishes fitting in those environment .   freshwater mandarin fish Chinese minnow Smelt Cham Crusian carp crusian carp Cham freshwater carp long-nosed barbel Daenonggangi T oonggari Dongsari cut-tailed bullhead Korean rose bitterling northern snake head dark chub Chinese ninespine stickeleback Carp Yellow puffer eel/Japanese eel Jongge Korea oily shiner korean piscivorous chub Osteichthyes flathead mullet Chamjongge Big flat bittering Loach Sweetfish Molge False minnow Pungtungia herzi Catfish slender bitterling javeline goby Japanese sea perch skin carp black bullhead       Dace         Fishes in DMZ In DMZ there are 24 endemic fishes and rare fishes including trouts and salmons.   Miyugi Pussy wilow Trout Gonoproktopterus mylodon Yeolmok fish Mochimangduk Yellow freshwater mandarin fish Gumgangmochi common Korean bitterling Korean spotted sleeper Wemechi Julnapjaru Korean spined bittering slender shiner Shiri Molge Dolmaja white-nosed loach Chamjongge fareastern brook lamprey yellow fin sculpin/Miller’s thumb Ginmolge black bullhead Toonggari   Not only flood of the mouth of Imjin river but that of most of the mouth of rivers financially damages civilized society temporarily, but in the long run it carries plenty of organics to field and makes field rich. However, because recently 2nd industry rather than farming is economically gives us more benefit, flood control to keep flood those overflow becomes important economical and social issue and throughout the year water is used for need for it; usual water level of Imjin river has continually decreased which is threatening the survival of creatures living under water here. Especially the more dam in North Korea are built, the less water in mid and down stream of Imjin river has which endangers the lives of many people who live fishing have been depending on water here due to decrease of fishes in Imjin river. Since with its slow flow, Imjin river has a developed city nearby and the city has a good water traffic and there are specialities such as yellow swellfish, mullet, carp, king crab etc, people livingNear the mouth of Imjin river are supported. However since the modern times, South and North are parted and water traffic are stoped; yellow swell fish, mullet those used to be speciliaties are catched less due to overfishing and decrease of inhabitats. Now we will put together the research of fishes living in Imjin river to grasp the exact situation fof fishes decreasing and study about feature of their living and solution for protecting them.