The b value in length-weight relationship in an ideal fish will be equal to 3 (Allen, 1938). Significant variation from the isometric growth is not always common in fishes (Beverton and Holt, 1957). Similar significant difference between the length - weight relationship of males and females was found for S. canaliculatus from the Arabian Gulf (Al-Ghais, 1993). However, no significant difference was observed between the length-weight relationships of males and females of S. canaliculatus from Indian waters by Jayasankar (1990). The observation in the present study that the females were slightly heavier than males of same length is in agreement with the earlier study by Al-Ghais (1993)