Freshwater insects are species that live in or near freshwater habitats, such as rivers, lakes, and ponds. They play essential roles in the ecosystem, including serving as food for fish and other wildlife. Common types of freshwater insects include dragonflies, mayflies, and caddisflies, each with unique life cycles and adaptations. These insects often undergo a process called metamorphosis, where they change from aquatic larvae to adult forms. Freshwater insects contribute to nutrient cycling and help maintain water quality by breaking down organic matter. Their presence indicates a healthy ecosystem, making them important indicators of environmental health.