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And back into the water. >> let's talk about the safety of the seafood, jim. nearly 5 billion barrels of oil have gone into the gulf of mexico. that oil's got to go somewhere. there are concerns it's making its way up the food chain. what are the feds and the state doing to assure that the seafood is safe? >> reporter: well, there's testing that's going on right now. the fda, you know, we've heard about these tests that go on. you know, dockside, in some cases where fda officials will be doing smell tests of the seafood and saying, okay, it doesn't smell like we have oil in the seafood. what's...

Made to detect contamination in seafood from the gulf? answer, dr. overton, there is no fishing or harvesting in a large area that has been affected by the oil. of course, fish can swim in and out of that zone so the zone of no fishing is much larger than the actual oil area. then the catch is inspected rigorously by oreganoleptic testing which is a fancy science word for taste and smell. a selected portion is undergoing chemical analysis. then professor mcdonald says, there are tasters trained to find seafood contamination. taste can detect hydro carbons in the parts per million range. that's...