The video explores freshwater ecosystems, focusing on streams and rivers. It highlights the animals that inhabit these environments, such as the Pacific Giant Salamander, American Dipper, and Tailed Frog, and their unique adaptations to fast-moving water. The video also discusses the challenges faced by lampreys due to human-made barriers like dams and emphasizes the importance of conservation efforts to protect these ecosystems.

What are the three main types of freshwater ecosystems mentioned in the text?

How do streams differ from ponds and lakes in terms of water movement?

What adaptations do some animals have to survive in fast-moving water?

What challenges do lampreys face when trying to spawn upstream?

What actions can people take to help protect freshwater ecosystems?