The UK’s Department of Culture, Media, and Sport (DCMS) has officially submitted Little Cayman’s UNESCO World Heritage Preliminary Assessment document, on behalf of the Cayman Islands marking a major milestone in the island’s journey toward international recognition. Preliminary Assessments are a relatively new part of the UNESCO bid process, only having been mandatory for sites seeking World Heritage status over the last 4 years. The Preliminary Assessment is intended to provide UNESCO’s Advisory Bodies with an introductory view of the bid so they may provide valuable technical feedback ahead of the final submission known as the Nomination Dossier. Preliminary Assessments create no contractual obligation to the host country, but they can only be evaluated based on the scope provided, so the more content they contain, the better the picture painted for evaluators assessing the potential for a nominated site to meet the threshold for Outstanding Universal Value. The Little Cayman World Heritage (LC WH) Site is being submitted under the maximum number of application criteria for a natural site: Criteria 7 – Aesthetics, Criteria 8 – Unique Geology, Criteria 9 – Ecosystem Connectivity, and Criteria 10 – Biodiversity. In order to have the best chance at meeting those four criteria, it was recommended to the Cayman Islands Department of Environment (DoE) and the LC WH Steering Committee to submit the Preliminary Assessment with content covering the entire island of Little Cayman. However, the Preliminary Assessment document that was ultimately submitted to the UNESCO Secretariat with the support of Cayman Islands Government, focuses exclusively on Little Cayman’s Marine Protected Areas; celebrating 40 years of visionary conservation and some of the healthiest coral reefs in the Caribbean. Since the establishment of Cayman’s marine parks in 1986, Little Cayman’s waters have flourished under long-term protection. Today, they are home to vibrant coral reefs, exceptional biodiversity, and one of the world’s most dramatic underwater landscapes, including the world-famous Bloody Bay Wall. These reefs remain a rare example of a Caribbean ecosystem that is still functioning as nature intended - rich in marine life, structurally complex, and remarkably resilient. The bid also highlights the recovering Nassau Grouper spawning aggregation, a globally significant natural phenomenon and one of the last thriving aggregations in the region of this critically endangered (IUCN) species. Decades of science-based protections and community support have allowed the population to rebound, making Little Cayman a model for successful marine conservation. The Little Cayman World Heritage Steering Committee and the DoE are hopeful the narrower bid coverage will still give sufficient information for a technical evaluation of the Outstanding Universal Value that Little Cayman holds and lead to an invitation to submit a Nomination Dossier which will ultimately be successful in having Little Cayman recognised by UNESCO for inscription as a World Heritage Site. Little Cayman’s submission represents a once-in-a-lifetime opportunity to celebrate and safeguard a national treasure - ensuring that its extraordinary marine environment continues to thrive for future generations.