Most crustaceans are free-living aquatic animals, but some are terrestrial (e.g. woodlice, sandhoppers), some are parasitic (e.g. Rhizocephala, fish lice, tongue worms) and some are sessile (e.g. …

Dec 12, 2025 · crustacean, any member of the subphylum Crustacea (phylum Arthropoda), a group of invertebrate animals consisting of some 45,000 species distributed worldwide. Crabs, lobsters, …

Crustaceans have evolved a variety of specialized body forms and behaviors to cope with both aquatic and terrestrial environments; however, all crustaceans share several characteristics: a hard …

Crustaceans are a large, diverse group of invertebrate animals within the phylum Arthropoda. Primarily aquatic, these creatures are found globally in various habitats and are recognized by their hard …

Most crustaceans are free-living, but some are sessile and a few are even parasitic. Most use their maxillae and mandibles to take in food. The walking legs, including specialized chelipeds, may be …

Crustaceans (subphylum Crustacea) comprise the group of arthropods (phylum Arthropoda) that includes the familiar crabs, lobsters, shrimps, barnacles, copepods, krill, water fleas, and crayfish.

Crustaceans include crabs, lobsters, crayfish, shrimp, krill and barnacles. They are relatives of insects. If the Arthropods are regarded as a superphylum, then the insects and crustacea would be phyla (see …

Dec 13, 2019 · Crustaceans include commonly-known marine life such as crabs, lobsters, barnacles, and shrimp. These animals are in the Phylum Arthropoda (the same phylum as insects) and …

They are unusually diverse and successful on land for a crustacean group, with about 4000 species of pillbugs (or woodlice). Most of these prefer moist habitats, and they tend to be nocturnal scavengers.

4 days ago · But new genetic and expeditionary research published in Royal Society Open Science has found that this giant crustacean inhabits nearly 59 percent of the world's ocean floor, overturning ...