Fecundity of Psenopsis cyanea (Alcock) belonging to the family               Centrolophidae has been worked out. Absolute fecundity varied from 20,581 to 36,245 eggs in specimens ranging in total length from 131mm (27g) to 187mm (39g) while the number of ova per gram of ovary weight ranged from 618 to 908. The maturity indices varied from 5.2 to 6.9. Fecundity in relation to total fish length, fish weight, ovary length and ovary weight were regressed and the results showed positive correlation with total length and total ovary length. Average number of eggs per gram body weight was 742 and the same for one millimetre length of body worked out to 155. The reduction of fecundity in the length class 180-184 mm can be considered as a manifestation of aging and the reciprocal decrease in the reproductive capacities of the fish.