How does the blackfly larvae hold on against the current?

Blackfly larvae possess specialized adaptations that allow them to cling to surfaces in fast-flowing water. They have large, hook-like mouthparts and a flattened, tapered body that help them anchor firmly to rocks and vegetation. Additionally, their ability to create a silk thread enables them to secure themselves, minimizing the risk of being swept away by strong currents. These adaptations are crucial for their survival in the often turbulent environments where they thrive.