Dear colleagues, I hope this message finds you well, and thank you in advance for your time. My name is Victor Garcia-Bustos, an infectious diseases physician and researcher hospital-based in Valencia, Spain. While my clinical work has focused on fungal infections in humans, I am increasingly involved in One Health research on fungal pathogens in marine mammals as neglected hotspots and reservoirs for fungal emergence, aiming to bridge insights between human and wildlife health in the context of climate change and rising pollution. Building on this perspective, I would like to explore the possibility of launching a multicentre retrospective study on invasive fungal disease in cetaceans. The aim would be to compile cases not only of confirmed invasive infections, but also instances where fungal pathogens (both yeasts and moulds) were isolated and regarded as potentially significant, even if they did not fully meet invasive disease criteria. The available literature on this topic remains scarce, and I believe that pooling data across institutions could provide valuable insights. Specifically, the study would seek to characterise, among others: * Epidemiology of both host and fungal species * Types and sites of infection * Any available antifungal susceptibility data * Spatiotemporal trends and potential ecological drivers Ultimately, the goal would be to produce a co-authored publication that advances our understanding of fungal disease in cetaceans. Best regards, Victor Garcia-Bustos, MD, MSc, PhD. Unit of Infectious Diseases, University and Polytechnic Hospital La Fe Severe Infection Research Group, Health Research Institute La Fe Avinguda Fernando Abril Martorell, 106 46026, Valencia 📞+34 696684551 / 961244000 (ext. 491632) ✉️ garcia_vicbus@gva.es