I buy Louisiana oysters all the time. The dolphin kill corresponded with their calving season happening when the spillways were open and had to do with Mississippi river water pushing the salt water out of the area. The beaches on the Louisiana coast look the best I have seen them in 35 years. The real damage from the Horizon in my opinion came from the chemicals the government made them spray on the oil to make it sink. Most of the free oil would have evaporated. and just heavies would have been left. Sunshine and wave action would have done most of the cleanup. Now there is a combination of crude and chemicals through the whole water column. or lying on the bottom where the fish contact it.