The length weight relationship (LWR) of Cynoglossus macrostomos and c. arel  from along the south west coast of India was studied. The LWR for the first species was  W=0.000002194 ^3.16378 for males and W=0.000002953 L^3.10734 for females The ‘r’ value revealed very good correlation between length and weight. By testing the regression coefficients against the isometric growth value it was found that there was no significant variation between sexes of both the species. Both the species showed isometric growth. The relative condition (Kn) in C. macrostomus was studied for the first time. The analyses both size group wise and season wise indicated that the variations in Kn value are related to the maturity cycle and spawning in this species.