The largest global assessment of freshwater animals on the IUCN Red List of Threatened Species to date has revealed that 24% of the world’s freshwater fish, dragonfly, damselfly, crab, crayfish and shrimp species are at high risk of extinction, according to an analysis published in Nature today. Migratory fish such as sturgeons suffered these losses decades ago and since then little has improved in terms of water management to protect biodiversity. This is emphasized by Dr. Jörn Gessner, co-author of the study from the Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB).