Major Animal Phyla Characteristics
multicellular organisms that have bodies full of pores and channels allowing water to circulate through them
Roundworms with a tubular digestive system. Nematodes have successfully adapted to nearly every ecosystem.
Invertebrates that almost always have a shell and most live in water.
Consists of all aquatic, carnivorous animals that have stinging cells.
Consists of segmented worms found worldwide such as earthworms and leaches. Mostly marine worms.
Adults recognizable by their radial symmetry. All marine, bottom dwelling invertebrates.
Flatworms, relatively simple invertebrates that have bilateral symmetry. About 20,00 speciesspecies
Invertebrates animals that have an exoskeleton and segmented bodies.
Animals possessing a notochord, a hollow dorsal nerve and have an internal skeleton