UPDATE from NOAA:

On November 18th 2015: National Oceanic and Atmospheric Administration (NOAA) and the National Park Service (NPS) signed a Memorandum of Understanding (MOU) with Cuba’s Ministry of Science, Technology, and Environment (CITMA). The MOU aims to facilitate joint efforts concerning science, stewardship, and management related to Marine Protected Areas (MPAs). The MOU also includes a sister MPA program to foster conservation and understanding of natural marine resources in both countries, sharing technical and scientific data, and promoting education and outreach initiatives.

Information provided by Seeturtles.org:

Guanahacabibes National Park covers the westernmost point of Cuba's main island. Its one of the largest protected areas in the country with a size of more than 150 square miles (about 400 km sq). Home to a variety of habitats including coral reefs, beaches, mangroves, scrublands, and evergreen forest, Guanahacabibes has more than 170 species of birds and dozens of reptile and mammal species.