According to a report at the link below, the government has based their decision in part on human smell tests. The rule "if it stinks don't eat it" is not very scientific.
Some Gulf fishermen are questioning whether the fish and shrimp are OK to feed to their own families.
The photo shows a plane spraying dispersant in the Gulf of Mexico.
One fisherman asked, "if I put fish in a barrel of water and poured oil and Dove detergent over that, and mixed it up, would you eat that fish? I wouldn't feed it to you or my family. I'm afraid someone's going to get sick."
More here.
A picture of my cave
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