Abstract:Moray eels are commercially important fish species in Taiwan. These fishes are distributed in the tropical and subtropical coral reef and are edible. To obtain useful information for identifying the species of moray eel that might be used in processed fish products, nine fresh moray eels including Gymnothorax favagineus, G. fimbriatus, G. flavimarginatus, G. meleagris, G. pseudothyrsoideus, G. undulatus, G. albimarginatus, G. javanicus and G. kidako were assayed using the electrophoresis method of SDS-PAGE. The SDS-PAGE patterns of myofibrillar and sarcoplasmic proteins for the nine fresh moray eel species showed species-specific protein bands of 30 kD. The species of moray eel meat that may occur in processed fish might therefore be identified through comparison of the myofibrillar and sarcoplasmic proteins revealed by SDS-PAGE patterns.