As for the fish, researchers are still trying to determine where exactly they are migrating to understand the full scope of the disaster, and no scientific consensus has emerged about the trend.更

Mark Robson, director of the Division of Marine Fisheries Management with Florida Fish and Wildlife Conservation Commission, said his agency has yet to find any scientific evidence that fish are being adversely affected off his state's waters. He noted that it is common for fish to flee major changes in their environment, however.

In some areas along the coast, researchers believe fish are swimming closer to shore because the water is cleaner and more abundant in oxygen. Farther out in the Gulf, researchers say, the spill is not only tainting the water with oil but also depleting oxygen levels.

A similar scenario occurs during "dead zone" periods - the time during summer months when oxygen becomes so depleted that fish race toward shore in large numbers. Sometimes, so many fish gather close to the shoreline off Mobile that locals rush to the beach with tubs and nets to reap the harvest.

But this latest shore migration could prove deadly.

First, more oil could eventually wash ashore and overwhelm the fish. They could also become trapped between the slick and the beach, leading to increased competition for oxygen in the water and causing them to die as they run out of air.

"Their ability to avoid it may be limited in the long term, especially if in near-shore refuges they're crowding in close to shore, and oil continues to come in. At some point they'll get trapped," said Crowder, expert in marine ecology and fisheries. "It could lead to die-offs."

The fish could also fall victim to predators such as sharks and seabirds. Already there have been increased shark sightings in shallow waters along the Gulf Coast.

The migration of fish away from the oil spill can be good news for some coastal residents.

Tom Sabo has been fishing off Panama City, Fla., for years, and he's never seen the fishing better or the water any clearer than it was last weekend 16 to 20 miles off the coast. His fishing spot was far enough east that it wasn't affected by the pollution or federal restrictions, and it's possible that his huge catch of red snapper, grouper, king mackerel and amberjack was a result of fish fleeing the spill.

In Alabama, locals are seeing large schools hanging around piers where fishing has been banned, leading them to believe the fish feel safer now that they are not being disturbed by fishermen.

"We pretty much just got tired of catching fish," Sabo said. "It was just inordinately easy, and these were strong fish, nothing that was affected by oil. It's not just me. I had to wait at the cleaning table to clean fish."

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