Scientists have found microplastics in the breath of bottlenose dolphins. It’s the first evidence that marine mammals could be inhaling the toxic particles, a new study says.
For the first time, scientists have found evidence that marine mammals could be inhaling microplastics, according to new research that detected the potentially harmful particles in the breath of bottlenose dolphins off the coasts of Louisiana and Florida. Microplastics are small pieces of plastic defined as less than 5 millimeters long that have been linked to adverse effects on human and animal health in earlier studies.
To test the dolphins’ breath, the researchers took samples from 11 wild bottlenose dolphins — six from Barataria Bay in Louisiana, and five from Sarasota Bay in Florida — during catch-and-release health assessments in May and June 2023. The study team held up petri dishes to the mammals’ blowhole, through which dolphins inhale and exhale. After examining the dishes under a microscope, the scientists found that each dolphin exhaled at least one microplastic particle.
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