A shed carapace of a lady crab, part of the hard exoskeleton Body structure of a typical crustacean – krill. The body of a crustacean is composed of segments, which are grouped into three regions: the cephalon or head, [5] the pereon or thorax, [6] and the pleon or abdomen. [7]

Nov 8, 2024 · crustacean, any member of the subphylum Crustacea (phylum Arthropoda), a group of invertebrate animals consisting of some 45,000 species distributed worldwide. Crabs, lobsters, shrimps, and wood lice are among the best-known crustaceans, but the group also includes an enormous variety of other forms without popular names.

Oct 5, 2022 · Crustaceans are a large, diverse group of invertebrates of the phylum Arthropoda, whose classification also includes spiders, mites, scorpions and insects. Scientists believe that the number of crustacean species worldwide is between 50,000 and 67,000.

May 15, 2024 · Crustaceans are mainly a group of free-living aquatic arthropods that belong to the subphylum Crustacea. This subphylum includes prawns, crabs, lobsters, shrimp, krill, barnacles, and seed shrimp, among others.

Nov 25, 2019 · A crustacean is an invertebrate animal with a hard exoskeleton, segmented body and jointed legs. Most crustaceans are fully aquatic , although some, including many crabs , are semi-aquatic , and others, such as woodlice , are fully terrestrial (land-dwelling).

Dec 13, 2019 · The crustaceans are a group of marine life that includes crabs, lobsters, and shrimp. Learn more with this collection of crustacean facts.

Sep 3, 2023 · Crustaceans are fascinating invertebrate animals belonging to the phylum Arthropoda, subphylum Crustacea, and include a wide range of species such as crabs, lobsters, shrimp, and barnacles. They are mostly aquatic creatures but can also be found in some terrestrial habitats.