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an animal without a backbone

invertebrate

an animal without a backbone

porifera

an invertebrate with pores

cnidarians

invertebrates with stinging cells

annelids

worms with segmented bodies (earthworms)

echinoderms

invertebrates with spiny skin

mollusks

invertebrates with soft bodies

arthropods

invertebrates with jointed legs

sessile

permanently attached to one place

regenerate

an animal's ability to re-grow body parts

parasite

an animal that depends on and harms another animal

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