Population Surge: 1.8 Million Eels Released into Berlin Waters

In a significant conservation effort, Berlin's waterways are set to receive an influx of 1.8 million juvenile eels, known as glass eels due to their translucent appearance. This initiative is part of ongoing efforts to combat the alarming decline of the European eel population, which has been facing challenges for the past three decades.

The release, which involves 541 kilograms of glass eels, is strategically planned for various locations including the Oberhavel, Unterhavel, Spree, and Dahme rivers. The juvenile eels are released annually to bolster the dwindling population, which has been significantly impacted by habitat loss, migration barriers, and the effects of climate change.

Since the beginning of this conservation program, around 17 million eels have been reintroduced to Berlin's waters from 2005 to 2024. This initiative aims to enhance the return rate of mature eels that migrate back to their breeding grounds, providing a crucial lifeline to a species currently classified as endangered.

The eels set to be released were recently captured in the estuaries of French rivers leading to the Atlantic Ocean. Funding for this conservation effort comes from a combination of sources including the European Union, the Berlin state government, and fishing rights holders, costing approximately EUR130,250 this year alone.

The European eel has been designated as the Fish of the Year 2025, highlighting its ecological importance. It plays a vital role in maintaining water quality and controlling non-native crayfish populations. Moreover, it is recognized as one of the economically significant fish species in river and lake fisheries in the Berlin area.

The decline of the eel population is attributed to several factors, including the construction of dams and other structures that obstruct their migration routes, along with climate-related changes affecting their habitats. As the conservation efforts continue, the hope is to restore the eel population and ensure the species thrives in its natural environment.