Grouper Moon Project Results in Sweeping Science-Based Protections For Nassau Grouper

Nassau Grouper, an icon of Caribbean reefs, receives broad protections in the Cayman Islands. Photo by Stephanie Archer/Grouper Moon Project.
One of thousands - Nassau Grouper at the spawning aggregation on the west end of Little Cayman, the focus of REEF's Grouper Moon Project. Photo by Jim Hellemn, (c) Grouper Moon Project.
A spawning burst of Nassau Grouper, captured at the Little Cayman spawning aggregation. Photo by Jim Hellemn, (c) Grouper Moon Project.

We are excited and very proud to share amazing news – on August 15, 2016, the Cayman Islands government enacted a comprehensive set of regulations aimed at recovering Nassau Grouper, an endangered Caribbean reef fish. The new rules are based on more than a decade of collaborative fisheries research carried out by the Grouper Moon Project. REEF initiated the Grouper Moon Project in 2001 in collaboration with the Cayman Islands Department of Environment, and it has become one of our flagship programs. We work in partnership with scientists from Scripps Institution of Oceanography at UC San Diego and Oregon State University. The project is the Caribbean’s oldest continuous grouper spawning aggregation research program, and represents one of the most advanced, multi-faceted tropical fisheries research programs in the world.

The regulations represent the Caribbean’s most progressive set of management actions for Nassau Grouper, and include:

  • All take, possession, or sale of Nassau Grouper is prohibited from December through April (during the spawning months for the species)
  • When take is permitted (May – November), only fish between 16"-24” can be kept and no more than 5 Nassau Grouper per fishing vessel per day can be kept
  • Nassau Grouper may not be taken on spear gun at any time

Many of you have followed the progress of the Grouper Moon Project through the years. Our research has focused on the west-end aggregation site on Little Cayman, which supports one of the last great reproductive populations of this endangered species. Lessons learned in the Cayman Islands have benefited Nassau Grouper conservation efforts throughout the Caribbean.

The sweeping protections enacted for Nassau Grouper in the Cayman Islands last month represent the kind of action-oriented work that REEF is known for. This science-based management action would not have been possible without the dedication of Grouper Moon scientists and the support of REEF donors and volunteers. We greatly appreciate all our members who have contributed financially to REEF to make this important work possible.

We look forward to continuing our important work on spawning aggregations in the Cayman Islands and beyond. In addition to support from our members, REEF's work in the Grouper Moon Project has been supported by the Lenfest Ocean Program and Disney Conservation Fund. Significant field logistics support has been provided by Peter Hillenbrand, Southern Cross Club, and Little Cayman Beach Resort/Reef Divers.

For more information, visit www.REEF.org/groupermoonproject. And be sure to check out the PBS Changing Seas documentary filmed a few years ago about our work in the Cayman Islands.

Design by Joanne Kidd, development by Ben Weintraub