Major Animal Phyla Characteristics

Porifera

multicellular organisms that have bodies full of pores and channels allowing water to circulate through them
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Nematoda

Roundworms with a tubular digestive system. Nematodes have successfully adapted to nearly every ecosystem.
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Mollusca

Invertebrates that almost always have a shell and most live in water.
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Cnidaria

Consists of all aquatic, carnivorous animals that have stinging cells.
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Annelida

Consists of segmented worms found worldwide such as earthworms and leaches. Mostly marine worms.
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Echinodermata

Adults recognizable by their radial symmetry. All marine, bottom dwelling invertebrates.
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Platyhelminthes

Flatworms, relatively simple invertebrates that have bilateral symmetry. About 20,00 speciesspecies
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Arthropoda

Invertebrates animals that have an exoskeleton and segmented bodies.
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Chordata

Animals possessing a notochord, a hollow dorsal nerve and have an internal skeleton
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