The ranges and means of certain morphometric indices of L. horie and L. forskalii and the significance of variation of such indices according to the total length were studied. Discrimination between the two species was possible by making use of the significance of differences between the regression coefficients of some of their morphometric characters and the significance of Y-intercepts of such characters. But for the pelvic fin ray count, all meristic counts considered for L. horie were highly significantly different from those of L. forskalii. In both species examined, a straight line rela tionship was found between the number of gill rakers on the first right gill arch and total length of the fish.