Branchiopoda are a class of small crustaceans that are found in freshwater habitats. Some of the synonyms for Branchiopoda include "fairy shrimp", "clam shrimp", and "water fleas". These crustaceans are important components of many freshwater ecosystems and are often eaten by larger aquatic animals. They are known for their unique ability to survive in ephemeral ponds and other temporary water sources. Despite their small size, Branchiopoda plays a crucial role in the food chain and are an important source of food for many animals. Branchiopoda's unique adaptability to different types of freshwater habitats has made them one of the most diverse groups of crustaceans on Earth.