What is the main factor contributing to Slimy Sculpin's survival in fast-flowing streams?

The main factor contributing to the Slimy Sculpin's survival in fast-flowing streams is low pH levels. This fish species is adapted to living in environments where water acidity is relatively low, which often coincides with clean, well-oxygenated waters commonly found in these fast-flowing streams. Low pH can indicate a healthy ecosystem with sufficient dissolved oxygen, which is crucial for the Slimy Sculpin's respiratory needs and overall metabolic processes.

Additionally, fast-flowing streams often have rocky substrates and a variety of aquatic vegetation, which provide shelter and breeding ground for the Slimy Sculpin. These elements, coupled with low pH, help maintain the ecological balance required for their survival. While high water temperature, vegetated shores, and slow-moving waters can affect fish populations, they are not the primary factors that support the thriving habitat of the Slimy Sculpin in fast-flowing streams.