Fingerling fish quality in aquaculture was concerned by fisheries, specific common carp, a traditional species was raised in fresh water was more likely to transmit zoonotic metacercaria. To investigate the epidemiological situation, the authors have carried into 1536 fingerling common carp samples at size of 10.55 + or - 1.51 g/fish collected from 54 waterbodies (ponds, canals, rivers, rice-fields) in 6 aquaculture systems (integrated fish-pig
fish-duck, rice-fish, bioslurry, intensive culture and natural systems) in two seasons (1070 fish samples in Spring-Summer and 466 fish samples in Autumn Winter) to test metacercaria by digest tissue method and the result shown that averaged prevalence was 23.89 percent and intensity of infection was 6.9 metacercaria/fish. High prevalance & intensity metacercaria of fingerling common carp were found in Spring-Summer (26.64 percent
7.68 metacercaria/ fish) than in Autumn - Winter (17.60 percent
4.05 metacercaria/fish). Hight intensity occurred in natural and integrated systems, low prevalence intensity were found in bioslurry and intensive culture systems. Three metacercaria species of small intestine flukes and one metacercaria species of liver fluke were found as Centrocestus formosanus, Haplorchis pumilio, H.taichui and Clonorchis sinensis in fingerling common carp. During metacercaria of C. formosanus caused opened gill disease in fry and fingerling fish. Two metacercaria species of C. formosanus and H. pumilo were found with high prevalence and intensity (19.47 - 19.53 percent
3.82 - 3.93 metacercaria/fish).