Lots of Sharks, Lots of Oil Seen Off Bon Secour (with video)Published: Saturday, June 19, 2010, 6:19 PM Updated: Saturday, June 19, 2010, 6:34 PM
Ben Raines, Press-Register
FORT MORGAN, Ala. -- A two-inch layer of submerged oil hugged portions of the Gulf seafloor off the Bon Secour National Wildlife Refuge on Friday, a week after a smothering layer of floating crude washed ashore there.
Collecting in pockets and troughs in waist-deep water, the underwater oil was looser and stickier than the tarballs spread liberally along the beach. The consistency was more like a thick liquid, albeit one made up of thousands of small globs. Unlike tarballs, which can often be picked up out of the water without staining the fingers, the submerged oil stained everything that it touched. A hand passed through the material emerged covered in oily smears. A hunk of fabric hovering near the bottom was completely covered in oil.
The Press-Register found a number of patches of submerged oil 40 to 100 feet off the beach, apparently collecting along rip currents and sandbars. The carcasses of sand fleas, speckled crabs, ghost crabs and leopard crabs were spread throughout the oil, a thick layer of the material caking the bodies of the larger crabs. Their claws looked as if they been turned into clubs made of oil. Thumb-size sand fleas burrow in the sand where the waves wash onto the beach. It appeared that they had suffocated.
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Dead fish seen onshore seemed to have collected in the areas closest to the underwater oil. It was unclear if the fish died because of exposure to the oil. The Dauphin Island Sea Lab measured large areas of low oxygen water just off the beach at Fort Morgan last week, beginning in water around 20 feet deep. Monty Graham, a University of South Alabama scientist, theorized that the population of oil-consuming microbes had swelled, and those tiny animals consumed lots of oxygen.
Sea life begins to die if oxygen levels drop below 2 parts per million.
"We saw some very low oxygen levels, some below 1," said Graham, of testing he conducted aboard a Dauphin Island Sea Lab research vessel.
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