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Rachel Silverstein, a coral reef scientist and director of the non-profit Miami Waterkeeper, holds pieces of coralon March 21, 2016, that died in the Port of Miami dredging project which began in 2013. Filmmaker and conservationist Philippe Cousteau has warned that a multi-million dollar plan to deepen an international shipping port off south Florida could devastate fragile parts of the continental United States' only barrier reef. (Photo by KERRY SHERIDAN / AFP) / TO GO WITH AFP STORY BY KERRY SHERIDAN "Cousteau warns of reef damage in Florida port project (Photo by KERRY SHERIDAN/AFP via Getty Images)