Age and growth of Atlantic bonito (Sarda sarda Bloch, 1793) were determined in the Black Sea and Sea of Marmara from October 2003 to May 2005. A total of 694 samples ranging from 23.5 to 71 cm total length was collected; age estimates were carried out on otoliths of 248 fish. Male and female fish ages were estimated as up to 3+. The length–weight relationship and the von Bertalanffy growth curve (TVBGF) were described for all individuals as: W = 0.0054L3.215 and Lt = 68.01 [1 − e−0.895 (t + 0.395)]. These data are discussed in relation to other growth studies of S. Sarda in the Mediterranean Sea.