Since 2010 when it was formed, the CORE Foundation has been battling predatory lionfish, toxic chemicals in sunscreens, and rampantly destructive Stony Coral Tissue Loss Disease. Now, however, the volunteers at CORE are moving in a new positive direction – defining the best practices for growing corals in an underwater nursery (as opposed to in a laboratory) and applying these techniques within the Virgin Islands National Park on St. John.