The study of the age and growth of Sardina pilchardus showed that the sex-ratio is in favor of females. The sardines sampled during the period of study present different age. Growth parameters were estimated using the direct method of Von Bertalanffy, gave asymptotic length, L∞ 23.26 and 23.03 cm and curvature parameter, K of 0.41 and 0.37 per year for females and males respectively. The study of the regression of fish size otolith weight of Sardina pilchardus, showed significant relationships with positive correlation coefficients. During the first year of their lives, this species shows high and rapid growth, weight gain, increased in size and the linear and weight growth is slightly different between males and females in the North area of the Moroccan Atlantic coast.