Migratory freshwater fish (i.e. fish that use freshwater systems, either partly or exclusively) occur around the world and travel between critical habitats to complete their life cycle. In the first Living Planet Index for Migratory Freshwater Fish published in 2020, migratory freshwater fish populations were shown to have declined by an average of 76% since the 1970s. The 2020 report showed that average population declines were more pronounced in Europe (-93%) and Latin America & Caribbean (-84%), and least in North America (-28%). However, the highest percentage of species represented in the analysis (almost 50%) migrated in waters of Europe and North America. For the continents of Africa, Asia, Oceania, and South America, data was highly deficient in the first report. Data and analysis updates are being pursued, with a focus on those data deficient regions, ahead of World Fish Migration Day 2024 with anticipation of an updated report on the status of migratory freshwater fishes in 2024 and subsequent scientific publication in 2025. If you have species population data to contribute to the analysis or any questions about the updates being pursued, please contact info@fishmigration.org.