One specimen of Emme1ichthys struhsakeri Heemstra and Randall belonging to the family Emmelichthyidae was collected for the first time from Cheju island, Korea. E. struhsakeri is similar to Erythroc1es schlegelii, but differs in some morphological characters: the presence of the keel on the caudal peduncle region, the presence of the three isolated short spines between spinous and soft dorsal fins.