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 …

Jan 9, 2015 · The meaning of CRUSTACEAN is any of a large class (Crustacea) of mostly aquatic mandibulate arthropods that have a chitinous or calcareous and chitinous exoskeleton, …

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, …

CRUSTACEAN definition: 1. any of various types of animal that live in water and have a hard outer shell 2. any of various…. Learn more.

CRUSTACEAN definition: any chiefly aquatic arthropod of the class Crustacea, typically having the body covered with a hard shell or crust, including the lobsters, shrimps, crabs, barnacles, …

3 days ago · Understand the biological definition of a crustacean, how they differ from other arthropods, and their global importance.

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, …

Definition of crustacean noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

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, …

any of a subphylum (Crustacea) of arthropods, including shrimps, crabs, barnacles, and lobsters, that usually live in the water and breathe through gills: they have a hard outer shell and jointed …