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1 .This is Scientific American 60-Second Earth. I'm David Biello. Your minute begins now.
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2 .You've heard of the canary in the coalmine.
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3 .Well, a species called the Gulf killifish might be the fish in the oil well.
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4 .Three years ago, the blowout at BP's Macondo well spewed more than 5 million barrels of oil into the Gulf of Mexico.
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5 .Despite attempts to recover it, much of that oil made it into sediments.
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6 .And new tests show that such oiled sediments are bad for Gulf fish.
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7 .The research is in the journal Environmental Science and Technology.
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8 .The Gulf killifish maxes out at about 18 centimeters in length and is ubiquitous all along the U.S.south coast.
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9 .That makes it a good subject for testing the spilled oil's toxicity.
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10 .When a consortium of researchers ran those tests, they found multiple negative effects.
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11 .The oiled sediments were associated with delayed hatching of embryos, smaller newborns and heart defects.
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12 .And fewer of the eggs hatched at all, even among those exposed to sediments collected a full year after the oil spill began.
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13 .Adults captured in the wild showed an immune response to oil in their gills and livers.
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14 .These effects might be found in everything from other fish to the famous Gulf shrimp and oysters.
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15 .We're just beginning to understand the full price of our oil addiction.
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16 .Your minute is up, for Scientific American 60-Second Earth. I'm David Biello,
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