What are Crustaceans ? Crustaceans are a varied group of invertebrate organisms belonging to the phylum Arthropoda and subphylum Crustacea. They include common species such as barnacles, crabs, crayfish, lobsters, shrimp, water fleas, and pill bugs. While most are aquatic, certain species may be found in terrestrial settings. Of the roughly 40,000 species of aquatic crustaceans , only about 10% exist in freshwater habitats. They have developed a vast diversity of body shapes and behaviors to ... Crustacean - Aquatic, Arthropod, Exoskeleton: The sexes are usually separate in crustaceans , but some are parthenogenetic, and others are hermaphrodites; differences between the sexes can be extreme. The most typical larva is called a nauplius. Crustaceans play many roles in aquatic ecosystems. The basic crustacean body consists of somites, acron, telson, appendages, carapace, and an exoskeleton. Most crustaceans have exoskeletons and live in freshwater or saltwater environments. Let's look at 15 examples of crustaceans . Learn about crustaceans , a group of free-living aquatic arthropods with biramous appendages and unique larval forms. Find out their classification, body plan, organ systems, and examples of crustacean species.
