Nature and EnvironmentThe realm of the manta raysTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoNature and Environment06/04/2016June 4, 2016Overfishing and demand for their gill rakers in Chinese medicine are threatening the majestic manta rays off the coast of Mozambique. But they have a champion in marine biologist Andrea Marshall.https://p.dw.com/p/1J0ABAdvertisement