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Biological characteristics of Liza klunzingeri were studied in two coastal areas, Sajaphi and Bahrekan, of eastern Khuzestan during March to February 2007. Among total 1880 measured fish specimens, 947 specimens were analyzed. The mean value of Gonado-somatic Index (GSI) for the male and female fish were calculated as 0.96± 1.39 and 3.25 ± 3.26 respectively. The GSI value was highest in November and lowest in July. The mean value of condition factor (K) was 1.25± 0.14 in male and 1.21± 0.15 for female. The highest K value were observed in June and the lowest value in February. The lenght at first maturity regardless of sexuality, was found to be 14.5 cm and the time of spawning based on reproduction pattern were determined in Nov- Dec. The length-weight relationship were calculated as Y=0.024L^2.76 (n=226R2=0.72) for males, Y=0.011L^3.00 (n=444R2= 0.78) for females and Y=0.0208L^2.82 (n=670R2 =0.82) for total fishes and also it’s found significant in level length weight relationship in (P

This study was conducted in order to bioaccumulation of heavy metals Zn, Cu, Cd and Pb in shell and muscle of white shrimp native species of Khouzestan Province in summer and winter of 2013, 80 samples were collected from station of Bahrekan in coast of Hendijan, West-North of Persian Gulf. Then Biometry and preparation of shell and muscle samples, metals were extracted using acid digestion method and concentration of heavy metals was measured by Atomic Absorption Spectrophotometer. Results showed that in shell and summer total of metals were higher than muscle and winter season and was significant relationships between them (P≤0.05). The maximum concentration of Zn in shell and two season summer and winter observed (44.61± 1.67 and 16.33±1.37 mg/kg dry weigh) and the minimum concentration of Cd (0.1±0.004 and 0.001±0.0001 mg/kg dry weigh) was determinate. There was a significant relationship between water and shrimp for accumulation of heavy metals in two seasons (P≤0.05). Results showed accumulation of Cd was higher than the NHMRC and the INSO standard.