Goldfish rearing is common in most countries of the world. In this study, 150 specimens of Goldfish were taken from four fish farms (12 pools) seasonally and selectively, and transferred alive in the bacteriological laboratory of Inland Waters Aquaculture Research Center. The bacteria were isolated from professional test and biochemical methods. The results showed that Goldfish and pool water bacteria isolations were included Enterobacteriaceae, Pseudomonas sp., Aeromonas sp., Sterptococcus sp., Vibrio sp., Mycobacterium sp. In different seasons of the year, the highest and lowest abundance of bacteria in Goldfish, respectively, belonged to the genus Pseudomonas spp. (33/6%) and Streptococcus spp. (7/3%).