The afternoon it was released I saw a Magikarp at the Domain entrance where I ' ve never seen one . So excited . Turned out to be a 14 CP Magikarp . <| sep |> Yes . My post shows conclusively the actual source of reduction of US mercury emissions in the relevant time period for the study was not coal , but waste incineration and is currently the 2 nd highest rated comment . Of course , that may not actually be the reason for reduced mercury in bluefin tuna , as this still rests on the assumption that reduced current atmospheric pollution is driving biological levels of a longlived oceanic species , a huge assumption not addressed by the research being looked at . Because we know that mercury levels in the oceans persist for a very long time , it is entirely plausible reductions in emissions even longer ago would be responsible for a much later decline in mercury levels in bluefin tuna , such as the previous reduction in mercury pollution from gold mining in the US .