In this study the growth and reproductive features of the flathead trout (Salmo platycephalus) found in the IUCN red list of threatened species in Zamanti Stream of Seyhan River were investigated. The population was composed of 50.44% female, 40.71% male and 8.85% immature individuals. The fork lengths (cm) and total weights (g) of the individuals varied between 11.3 to 40.1 cm and 19.7 to 988.7 g, respectively. Ten age groups (1 to 10) were identified in the population and majority of the sample was between 26.0 to 38.0 cm (69.91%) and 36.28% was between 410 and 660 g in weight. The length-weight relationship for all sample was W = 0.016*FL(2.938) with R(2) = 0.989. The growth parameters was estimated as; L(infinity)=60.78 cm, K=0.091 and to= -1.72. The condition factors varied from 1.04 to 1.93 and the differences in condition between female and male was not significant (P>0.05). According to 051 and agg dimaters, spawning period was determined between October and December. Mean fecundity was 2,398 egg/fish, egg diameters was between 4.387 and 5.408 mm (mean diametrers was 4.782 mm) on mature individuals in reproductive periods.