Abstract: The skeletal abnormalities of vertebral column and fins were studied in juvenile yellow grouperEpinephelus awoaraby double staining technique.The results showed that the deformities in the vertebral column such as lordosis,scoliosis,kyphosis and fusion were observed.Abnormal dorsal fins were found to display the fork of proximal pterygiophore and existence of a cartilage fragment.However,the abnormalities in anal fin showed only a fork of proximal pterygiophore.The caudal fin deformities showed only one or two pieces of epural while the normal fish has three pieces of epural.