Ecological reports show varying fish species status in Germany and Austria

Recent ecological assessments in Germany and Austria reveal varying statuses for freshwater biodiversity. In Hamburg, the 2026 Red List for freshwater fish and jawless fish indicates that 43 percent of the 47 native species are currently threatened. Migratory species such as eel and smelt are under significant pressure due to migration barriers, pollution, and rising water temperatures caused by climate change. However, some species like the brook lamprey and bullhead have seen status improvements due to cleaner waters and better ecological connectivity.

In Austria, a three-year monitoring project conducted by the Austrian Federal Forests and the Federal Office for Water Management examined eight alpine small lakes. The study found that while native fish populations are under pressure in many locations, noble crayfish populations showed positive developments in several areas. These small alpine lakes serve as vital refuges for native species and are subject to increasing use from tourism and fishing.