are a vast and diverse group of invertebrate animals
Crustaceans are primarily , found in nearly every marine and freshwater environment on Earth. crustacean
: Their bodies are usually segmented, often featuring a cephalothorax (a fused head and trunk). Diverse Habitats and Ecological Roles are a vast and diverse group of invertebrate
: A few groups have adapted to life on land, including woodlice (sowbugs/pillbugs) and certain land crabs, though they still require damp environments to breathe through their gills. Common Examples crustacean