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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

object, physical object go
a tangible and visible entity

whole, unit go
an assemblage of parts that is regarded as a single entity

living thing, animate thing go
a living (or once living) entity

organism, being go
a living thing that has (or can develop) the ability to act or function independently

animal, animate being, beast, brute, creature, fauna go
a living organism characterized by voluntary movement

invertebrate go
any animal lacking a backbone or notochord

arthropod go
invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin

crustacean
any mainly aquatic arthropod usually having a segmented body and chitinous exoskeleton

noun.animal

8 Subcategories

malacostracan crustacean go
a major subclass of crustaceans
decapod, decapod crustacean go
crustaceans characteristically having five pairs of locomotor appendages each joined to a segment of the thorax
brachyuran go
typical crabs
stomatopod, stomatopod crustacean go
a kind of crustacean
branchiopod crustacean, branchiopod, branchiopodan go
aquatic crustaceans typically having a carapace and many pairs of leaflike appendages used for swimming as well as respiration and feeding
copepod, copepod crustacean go
minute marine or freshwater crustaceans usually having six pairs of limbs on the thorax
seed shrimp, mussel shrimp, ostracod go
tiny marine and freshwater crustaceans with a shrimp-like body enclosed in a bivalve shell
barnacle, cirriped, cirripede go
marine crustaceans with feathery food-catching appendages