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Structural and bio-technological aspects of Rainbow trout {Oncorhynchus mykiss W.. 1792) and Sea bass (Dicentrarchus labrax L., 1758) farms in the Black Sea Region of Turkey and growth performance of these fish farmed in the same farms were investigated in this study. Strafied random sampling method was applied to 11 small. 4 medium and 5 large scale farms selected from the region and for the sector as whole. Totally 20 farms separated three layers according to the production capacity and data were collected these farms using questionnaire forms. According lo the evaluated data on structural status of Rainbow trout and Sea bass farms in the Black Sea region. 69.8% of the farms are combine and 29.8% are just on-growing farms. In these farms, project capacity 29.2 MT/year, active capacity 32.0 MT/year and mean capacity utilization rate 114.5 MT/year were found respectively. The mean volume of rearing ponds capacity (small, medium and large capacity of farms) were found 3348 m3, 651.1 m3 and 13852m3 respectively. In the region, mean volume of rearing capacity was found 1782.7 m3 The average regional brood stock per farm was found 404 while the mean fecundity was determined as 2194.7 ova/female. The survival rate of fish in small, medium and large scale farms were found %55.9, %59.3 and %62.2 respectively and in the region was found Mean harvesting density in small, medium and large scale farms were found 18.2 kg/m3, 22 kg/m3 and 25 kg/m3 and regional mean was found 19 kg/m3 respectively and feed conversion ratio were found 1.80 for rainbow trout and 3.0 Tor sea bass in the region.