Freshwater fish are species that live in rivers, lakes, and ponds, where the water has low salt content. They are adapted to thrive in these environments, which can vary in temperature, depth, and flow. Common examples of freshwater fish include trout, bass, and catfish. These fish play a vital role in their ecosystems, serving as both predators and prey. They contribute to the food web and help maintain the balance of aquatic life. Freshwater fish are also important for human activities, such as fishing and aquaculture, providing food and recreational opportunities.