Flussperlmuschel

The Flussperlmuschel, scientifically known as Margaritifera margaritifera, is a freshwater mussel species found in Europe and eastern North America. This species is characterized by its long, dark, and often elongated shell. They are filter feeders, playing a crucial role in maintaining water quality by removing suspended particles from the water column. The life cycle of the Flussperlmuschel is complex, involving a parasitic larval stage that develops on fish, typically salmonid species. After a period of growth on the fish, the larvae drop off and settle on the riverbed, where they mature into adult mussels.

Historically, the Flussperlmuschel was more widespread, but populations have declined significantly due to habitat degradation, pollution, and overfishing for its pearls. These mussels can live for over a century, making them some of the longest-lived invertebrates. Their slow growth and long lifespan also make them particularly vulnerable to environmental changes. Conservation efforts are underway in many regions to protect remaining populations and restore suitable habitats. The presence of a healthy Flussperlmuschel population is often an indicator of good river ecosystem health.