Definition, Characteristics, Evolution, & Facts - Britannica
WEBSep 24, 2024 · Crustaceans are invertebrate animals with two pairs of antennae and jaws, belonging to the subphylum Crustacea of the phylum Arthropoda. They are diverse, abundant, and widely distributed in aquatic habitats, and some are amphibious or terrestrial.
Crustacean - Anatomy, Adaptations, Diversity | Britannica
WEBSep 24, 2024 · Learn about the form and function of internal features in crustaceans, such as the nervous system, eyes, digestive system, excretory system, and respiratory system. Compare the differences and similarities among crustacean groups, such as fairy shrimp, copepods, barnacles, and crabs.
Characteristics of crustaceans | Britannica
WEBLearn about the characteristics of crustaceans, a group of 45,000 arthropod species with two pairs of antennae and jaws. Find out how crustaceans live in different habitats, such as shrimps in the sea, crayfishes in freshwater, and land crabs on land.
Malacostracan | Definition, Characteristics, Examples, Classification ...
WEBMalacostracan is a class of crustaceans with more than 29,000 species, including lobsters, crabs, shrimp, and isopods. They have a fixed body plan of head, thorax, and abdomen, and show great diversity of size, form, and function.
Crustacean - Aquatic, Arthropod, Exoskeleton | Britannica
WEBSep 24, 2024 · Learn about the diversity, reproduction, and life cycles of crustaceans, a group of aquatic arthropods with exoskeletons. Find out how crustaceans vary in sex, egg-carrying, and larval forms, and how they molt and change over time.
Crustacean - Evolution, Paleontology, Adaptations | Britannica
WEBSep 24, 2024 · Learn about the origin, diversity, and classification of crustaceans, a group of aquatic animals with two pairs of antennae and three pairs of jaws. Explore their fossil record, carapace, limbs, eyes, and other features that help them adapt to different habitats and environments.
Crustaceans Portal | Britannica
WEBCrustaceans are a group of invertebrate animals with exoskeletons and jointed legs. They include crabs, lobsters, shrimps, and many other aquatic and terrestrial species. Learn more about their diversity, evolution, and ecology from Britannica articles.
list of crustaceans - Encyclopedia Britannica
WEBLearn about the different types of crustaceans, such as shrimp, lobsters, crabs, and barnacles, and their characteristics and examples. This article provides a comprehensive taxonomic overview of the subphylum Crustacea, with links to …
crustacean - Kids | Britannica Kids | Homework Help
WEBLearn what crustaceans are, where they live, and how they look. Crustaceans are arthropods with a hard shell and two pairs of antennas. They include crabs, lobsters, shrimps, and more.
Crustacean - Arthropod, Aquatic, Decapod | Britannica
WEBSep 24, 2024 · Crustacean - Arthropod, Aquatic, Decapod: Crustaceans have two pairs of sensory appendages in front of the mouth and 3 pairs of jaws behind the mouth; most are aquatic. Some are parasitic and lack all appendages when adult. Subphylum Crustacea has about 45,000 known species. There is no universal agreement on …