Using the vertebra ring reading method,this paper assesses the age andgrowth of albacore(Thunnus alalunga)in the Indian Ocean.The resultsindicate that(1)the comparison of regression formulae for fork length vs.centrum radius between males and females showed no significant difference;(2)the comparison of regression formulae for logarithm body weight vs.logarithm fork length between males and females showed no significantdifference;(3)one annulus was formed per year,the ring formation periodbeing from September to December;and(4)the von Bertalanffy's growthequation for fork length and body weight were estimated as follows:l(subscript t)=163.71(1-e(superscript -0.1019(t+2.0668)))andW(subscript t)= 81.70(1-e(superscript -0.1019(t+2.0668)))^(2.8758)