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 …

Dec 28, 2025 · crustacean, any member of the subphylum Crustacea (phylum Arthropoda), a group of invertebrate animals consisting of some 45,000 species distributed worldwide. Crabs, …

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 …

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, …

Most crustaceans live in the ocean, and are one of the pillars of the global marine ecosystem. In much of the open ocean, the primary herbivores feeding on the phytoplankton are crustaceans.

Aug 26, 2025 · Crustaceans are a diverse group of invertebrates in the phylum Arthropoda. This group includes over 45,000 described species found globally in various aquatic environments, …

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

Dec 28, 2025 · 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, …

May 14, 2018 · A crustacean is an invertebrate (an animal without a backbone) with several pairs of jointed legs and two pairs of antennae. It is covered by a tough exoskeleton (a hard outer …

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 …