Just sharing this journal for who like to read. i'm not browse all 10 pages so i apologize if already bening shared.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4334092/

Total mercury levels in marine fish sampled from the fish landing ports and the wholesale markets in Peninsular Malaysia are summarized in Table 3. Mercury levels of 46 marine fish species ranged from 0.055 to 2.537 mg/kg of dry weight. Significant variations of mercury levels exist in different species (χKW2 = 103.581; p < 0.001).

Among pelagic fish, the median for mercury levels was higher (>0.5 mg/kg) in scad (Selar boops) and bonito (Sarda orientalis). While for the demersal fish, the highest mercury levels were shown in John’s snapper (Lutjanus ruselli), mangrove red snapper (Lutjanus argentimaculatus), and doublewhip threadfin bream (Nemipterus nematophorus). Mercury levels were significantly higher in higher tropic level fish (χKW2 = 7.787; p < 0.02).