Twenty tar balls were found on Monday and more were found Tuesday. Where they come from is a mystery, but they can occur naturally or come from other sources, such as ships.
The local lab has been working long hours to conduct forensic analysis to show the source of oil coming in from the Gulr.
Government scientists who surveyed the Gulf on Tuesday said tendrils of light oil were near or already in a powerful current that could take it to Florida.
The loop current circulates in the Gulf and takes water south to the Florida Keys and the Gulf Stream. But most oil remains dozens of miles away from the current.