The Danube bleak (Alburnus alburnus), commonly known as the bleak, is a small, silvery freshwater fish native to rivers and lakes across Europe, particularly abundant in the Danube River basin. This species is prized for its role in local fisheries, both as a target for recreational anglers and as a source of baitfish and raw material for isinglass (a substance historically used in the clarification of beer and wine). The top countries engaged in bleak fishing along the Danube include Romania, Bulgaria, Serbia, and Hungary, where the fish is harvested commercially and recreationally. These nations benefit from the Danube’s rich biodiversity, with bleak forming a significant part of the riverine fishery. While not a major export species, bleak supports local economies and traditions, especially in rural communities where small-scale fishing remains an important livelihood.
| Rank | Country | Metric Tons |
|---|---|---|
| 1 | Bulgaria | 1 |
Data from FAO. 2025. Global Capture Production. In: Fisheries and Aquaculture.