Studying on the shirpms produced out of the freshwater in Nam-hae Island , the four kinds of them were found as follows : 1. Paratya compressa (De Haan) 2. Neocaridina denticulata (De Haan) 3. Neocaridina denticulata koreana Kubo 4. Caridina leucostica Stimposon Among the said kinds of them, Paratya compressa and Caridina leucostica are to be listed for the first time in Korean shrimps fauna, and at the same time, Neocaridina denticulata and Neocaridina denticulata koreana were found distributed mostly in whole the rivers, lakes and ponds of this area.