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Heavy metals have a relationship with fish organs. The aim of this study was to determine the distribution of heavy metals in various organs of  Gerres abbreviatus  and  Parastromateus niger . The research was conducted in Kao Bay waters from April to September 2019. Samples obtained were prepared at the aquatic science laboratory of Khairun University and were analyzed at the Environmental Productivity Laboratory of IPB University Bogor using the AAS instrument to determine heavy metals concentrations. The result of the heavy metals accumulation in  Gerres abbreviatus  meat was Zn &gt; Cu &gt; Pb &gt; Ni &gt; Hg &gt; Mn &gt; Cd. Meanwhile, the heavy metals accumulation in Roi fish ( Parastromateus niger ) meat was Zn &gt; Mn &gt; Ni &gt; Hg &gt; Pb &gt; Cd &gt; Cu.

iop conference series. earth and environmental science

Accumulation and distribution of heavy metals in Gerres abbreviatus (Bleeker 1850) and Parastromateus niger (Bloch, 1795) in Kao Bay, North Maluku, Indonesia