Zebramusslan

Zebramusslan, scientifically known as Dreissena polymorpha, is a small freshwater mussel native to the Caspian and Black Seas. It is an invasive species in many parts of the world, particularly in North America and Europe, where it has established dense populations. The mussel is characterized by its distinctive zebra-like stripes, which range in color from white to brown or black.

These mussels are typically small, reaching only about 2 to 5 centimeters in length. They have a triangular or D-shaped shell and are known for their ability to attach themselves to hard surfaces using byssal threads. This sessile nature allows them to colonize a wide variety of substrates, including rocks, docks, boat hulls, and other aquatic infrastructure.

Zebramusslan reproduce rapidly, releasing planktonic larvae that can be dispersed by water currents. Once they settle, they form dense colonies, often encrusting surfaces in multiple layers. This prolific growth can have significant ecological and economic impacts.

Ecologically, zebramusslan can alter aquatic ecosystems by filtering large volumes of water, leading to increased water clarity but also reducing the availability of plankton for native filter feeders. They can outcompete native mussels for resources and space, contributing to the decline of native bivalve populations. Economically, they pose a serious threat to water intake pipes for power plants and municipal water supplies, as well as to recreational boating by clogging engines and hulls. Control and management of zebramusslan infestations are ongoing challenges in affected regions.