Freshwater biodiversity refers to the variety of life found in rivers, lakes, wetlands, and other freshwater ecosystems. This includes a wide range of species, such as fish, amphibians, insects, and plants. These organisms play crucial roles in maintaining the health of their environments, providing food, and supporting local economies through activities like fishing and tourism. Protecting freshwater biodiversity is essential because these ecosystems are often threatened by pollution, climate change, and habitat destruction. Efforts to conserve species like the Amazon river dolphin or the European eel help ensure that these vital habitats remain healthy and resilient for future generations.