The GEMS Ocean / CSDTp initiative is organizing a two-and-a-half-day Hackathon (interactive design workshop) in the margins of the Cartagena Convention (COP 2023) on the Island of Aruba (Kingdom of the Netherlands in the Caribbean). A Digital Twin of the Caribbean Sea must integrate many different data sources and information from various stakeholders. A Digital Twin of the Caribbean Sea should provide a comprehensive, data-driven, dynamic platform for monitoring, analysing, and planning human activities, ecological services, and marine conservation measures in the Caribbean Sea region.