Table 2. The mean concentrations of total arsenic (As) and mercury (Hg) in muscle and two targeted organs (gills and liver) of Thunnus tonggol

Location	Organ	Total arsenic(As) (μg/g) w.w	Total mercury(Hg) (μg/g) w.w
Kuala Besut	Muscle	17.8 ± 4.1	0.460 ± 0.09
	Gill	17.11 ± 4.9	0.107 ± 0.06
	Liver	30.24 ± 5.28	0.23 ± 0.03
Kuala Terengganu	Muscle	8.74 ± 0.19	0.19 ± 0.03
	Gill	7.50 ± 2.9	0.038 ± 0.02
	Liver	24.3 ± 11.9	0.16 ± 0.03
Dungun	Muscle	30.5 ± 6.8	1.57 ± 0.33
	Gill	8.02 ± 2.9	0.142 ± 0.03
Kemaman	Muscle	16.7 ± 5.1	0.467 ± 0.1
	Gill	4.56 ± 1.6	0.02 ± 0.01

All values expressed in mg/kg wet weight ± SD.