NEW ORLEANS -- To the surprise of some of the Gulf's best marine scientists, marine mammals, like dolphins, appear to have been spared the effects of the oil.

In fact, no dolphins have been cleaned or rehabilitated in Louisiana, Mississippi or Alabama since the oil spill began. It's one of the scientific mysteries of the spill.

Sea turtles are needing rehabilitation in much greater numbers.

“Mississippi had no oil for a long period of time, and these animals were coming in and coming closer to the coast line,” said Executive Director of the Institute of Marine Mammal Research Moby Solangi.

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