Magnificent Nassau grouper spawning aggregations in the Cayman Islands and the vital need to protect those remaining for the future of this apex predator in this new short video from REEF.org. More info at Reef.org/GrouperMoonProject about this collaborative conservation program between REEF and the Cayman Islands Department of the Environment studying Nassau grouper (Epinephelus striatus) - a social and ecological corner stone of Caribbean's coral reefs.