ABSTRACT The presented study was conducted to evaluate the organoleptic, bacteriological and chemical quality ofsome fresh water fish species (Oreochromisniloticusand Clariaslazera) marketed in Zagazig city, Sharkia governorate, Egypt. The results revealed that,the organoleptic evaluation of O. niloticusand C. lazera sampleswas 94.2% and 90.7%.Themean values of total bacterial count in the examinedOreochromisniloticusandClariaslazerasamples were 6.63±0.06 and 6.58±0.057log₁₀ CFU/g,while, themean values of total enterobacteriaceaecount were 4.5±0.048 and 4.8±0.084 log₁₀ CFU/g,respectively. Histamine was found in 45(90%) of O. niloticus but all C. lazerasamples contained histamine with mean values of 10.7±2.5 and 16.01±3.24mg ̸100g inO. niloticusand C. lazera.