Total mercury concentrations ([THg]) in muscle were determined in commercial finfish and 26 elasmobranchs from Baja California Sur (BCS), Mexico to evaluate dietary Hg exposure 27 for BCS communities, including the relationship of trophic ecology, length and mass with 28 [THg] that might drive future consumption advice (e.g., recommend limited consumption 29 of large fish for some species). The [THg] ranged from 0.06 to 528.02 μg kg-1 ww in finfish 30 and 17.68 to 848.26 μg kg-1 ww in elasmobranchs. Relative to the consumption threshold 31 set for predatory fish in Mexico, all species had a concentration below 1000 μg kg-1 ww. 32 As expected, 16 (4.02%) and 75 (18.84%) individual fish were above advisory thresholds 33 of 500 and 200 μg kg-1 ww, respectively. The hazard quotients (HQs) in most species were 34 significantly 1.0. Thus, the 35 relative level of risk of high Hg exposure is low for most species.