This webinar provides insights into Structure-from-Motion (SfM) photogrammetry and how it is transforming the way we monitor and study marine and coastal habitats. This webinar introduces the fundamentals of SfM photogrammetry, explores the tools involved, and highlights its diverse applications—including coastal and underwater habitat mapping, biodiversity assessments, long-term ecosystem monitoring, and critical infrastructure inspection. It showcases how high-resolution 3D models of popular dive sites are being used to promote safe and informed diving tourism, while also serving as powerful tools for science communication and public engagement.