Gammaridae is a family of small, freshwater crustaceans commonly known as amphipods. They are characterized by their laterally compressed bodies and are typically found in various aquatic environments, including rivers, lakes, and wetlands. Gammarids play a crucial role in the ecosystem as they serve as a food source for fish and other wildlife. These organisms are important for nutrient cycling and help break down organic matter in their habitats. Gammaridae species exhibit a wide range of sizes and colors, contributing to the biodiversity of aquatic ecosystems. Their presence can indicate the health of freshwater environments.