invertebrate

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

any of various invertebrate animals resembling a plant such as a sea anemone or coral or sponge

primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies

radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms

biradially symmetrical hermaphroditic solitary marine animals resembling jellyfishes having for locomotion eight rows of cilia arranged like teeth in a comb

any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae

any of various insects or larvae or mollusks that bore into wood

minute aquatic multicellular organisms having a ciliated wheel-like organ for feeding and locomotion; constituents of freshwater plankton

invertebrate having a soft unsegmented body usually enclosed in a shell

hermaphrodite wormlike animal living in mud of the sea bottom

sessile aquatic animal forming mossy colonies of small polyps each having a curved or circular ridge bearing tentacles; attach to stones or seaweed and reproduce by budding

sessile mossy aquatic animal having the anus of the polyp outside the crown of tentacles

any of various moss-like aquatic animals usually forming branching colonies; each polyp having a both mouth and anus within a closed ring of tentacles

only known species of Cycliophora; lives symbiotically attached to a lobster's lip by an adhesive disk and feeding by means of a hairy mouth ring; its complex life cycle includes asexual and sexual phases

marine animal with bivalve shell having a pair of arms bearing tentacles for capturing food; found worldwide

small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanut

marine invertebrates with tube feet and five-part radially symmetrical bodies

an extinct arthropod that was abundant in Paleozoic times; had an exoskeleton divided into three parts

air-breathing arthropods characterized by simple eyes and four pairs of legs

general term for any terrestrial arthropod having an elongated body composed of many similar segments: e.g. centipedes and millipedes

minute arthropod often infesting the underground parts of truck-garden and greenhouse crops

an arthropod of the division Tardigrada

chiefly nocturnal predacious arthropod having a flattened body of 15 to 173 segments each with a pair of legs, the foremost pair being modified as prehensors

any of numerous herbivorous nonpoisonous arthropods having a cylindrical body of 20 to 100 or more segments most with two pairs of legs

any of various small spiderlike marine arthropods having small thin bodies and long slender legs

used in some classifications; includes the orders Xiphosura and Eurypterida

large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tail; a living fossil related to the wood louse

horseshoe crab of the coast of eastern Asia

large extinct scorpion-like arthropod considered related to horseshoe crabs

wormlike arthropod having two pairs of hooks at the sides of the mouth; parasitic in nasal sinuses of mammals

a siliceous sponge (with glassy spicules) of the class Hyalospongiae

one of two forms that coelenterates take (e.g. a hydra or coral): usually sedentary with a hollow cylindrical body usually with a ring of tentacles around the mouth

one of two forms that coelenterates take: it is the free-swimming sexual phase in the life cycle of a coelenterate; in this phase it has a gelatinous umbrella-shaped body and tentacles

any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans

any of various usually free-swimming marine coelenterates having a gelatinous medusoid stage as the dominant phase of its life cycle

colonial coelenterates having the polyp phase dominant

sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed

delicately iridescent thimble-shaped ctenophores

ctenophore have long tentacles and flattened body

ctenophore having a rounded body with longitudinal rows of cilia

ctenophore having a ribbon-shaped iridescent gelatinous body

worm that is parasitic on the intestines of vertebrates especially roundworms and tapeworms and flukes

a larva of a woodborer

any of various worms living parasitically in intestines of vertebrates having a retractile proboscis covered with many hooked spines

any worm of the Chaetognatha; transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth

parasitic or free-living worms having a flattened body

soft unsegmented marine worms that have a threadlike proboscis and the ability to stretch and contract

slender animal with tentacles and a tubelike outer covering; lives on the deep ocean bottom

unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic

worms with cylindrical bodies segmented both internally and externally

burrowing marine mollusk

a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes

primitive elongated bilaterally symmetrical marine mollusk having a mantle covered with eight calcareous plates

marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together

marine mollusk characterized by well-developed head and eyes and sucker-bearing tentacles

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

any of numerous velvety-skinned wormlike carnivorous animals common in tropical forests having characteristics of both arthropods and annelid worms

small air-breathing arthropod

an insect or other arthropod between molts

echinoderms characterized by five arms extending from a central disk

an animal resembling a starfish with fragile whiplike arms radiating from a small central disc

any starfish-like animal of the genera Euryale or Astrophyton or Gorgonocephalus having slender complexly branched interlacing arms radiating from a central disc

shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells

primitive echinoderms having five or more feathery arms radiating from a central disk

echinoderm having a flexible sausage-shaped body, tentacles surrounding the mouth and tube feet; free-living mud feeders