The remote Revillagigedo Archipelago off Mexico’s Pacific coast is a hotspot for giant mantas that interact with awestruck scuba divers. Scientists with the Pacific Manta Research Group are studying the local population using photo ID techniques and acoustic tags which track the movements of these mysterious fish. Experts from Pelagios Kakunjá are conducting experiments to see if the filterfeeding rays are impacted negatively by microplastics, tiny pieces of toxic trash that float in the ocean.

Learn more at: http://www.changingseas.tv/episode904...