"On November 12, 2021, 500 lab-reared Diadema antillarum were transported by cargo van to Puerto del Rey Marina in Ceiba, Puerto Rico. At each reef, 20 sea urchins were placed in three experimental corrals, and the rest were released onto the reef in grou...

Over the past three decades, coral reefs in the Caribbean have suffered massive declines due to cumulative factors such as hurricanes, disease outbreaks, bleaching, pollution, and overfishing. Many reefs in the Caribbean have lost their capacity to recove...