Two penaeid shrimps, Melicertus latisulcatus (Kishinouye, 1896) and Metapenaeopsis mogiensis mogiensis (Rathbun, 1902), collected from Jeju Island are described and illustrated with color photographs. Melicertus latisulcatus is previously known but without detailed description in Korean waters and M. mogiensis mogiensis is recorded for the first time. Distributional and morphological accounts of these two species are briefly discussed.