Fougeres said she doesn't think the dolphins are being targeted by a gang of people or even by a lone, sick individual.
"The cases are fairly spread apart," she said. "I don't think there is one dolphin murderer out there."
She added that anyone who sees a dead or stranded dolphin, or spots people harassing a marine animal can call the NOAA Enforcement hotline at 800-853-1964.
AP writer Janet McConnaughey contributed from New Orleans.
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