👉 Plutellidae are a group of small, flat-bodied crustaceans that belong to the family Plutellidae, commonly known as crabs or clams. These organisms have a long, slender body and a pair of large, flattened appendages called claws. They live in freshwater habitats such as rivers, lakes, and estuaries, where they feed on planktonic animals like small fish and crustaceans.