Scientist Craig Dahlgren has reared coral in the ice-blue waters of the Northern Bahamas for a decade, hanging pinky-size fragments on submerged trees of PVC piping and watching them grow. After about a year, the golden-colored building blocks of Caribbean reefs can be planted to help rehabilitate areas stressed by warming oceans and disease. It was going well, until Dorian. Now Dahlgren is preparing for the worst. He set sailed from West Palm Beach on Tuesday to evaluate reef health in Grand Bahama and Abaco following Hurricane Dorian. He expects much of what they've done to be destroyed. The team will spend two weeks in the Bahamas and report back after.