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polyp- Like a vase or a tube, with the mouth and tentacles on top like a sea anemone

Medusa- Like an umbrella or a bell, with the mouth and tentacles hanging down

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Evolutionary Changes from Previous Phylum

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Evolutionary Changes from Previous Phylum

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Cnidarians are more complex than sponges. They have true tissues groups of cells working together, unlike sponges

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Cnidarians can reproduce in a few ways-

Asexually- By budding growing a copy of themselves or fragmentation breaking into pieces

Sexually- By releasing eggs and sperm into the water

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Some jellyfish live for only a few days or weeks. Some sea anemones and corals can live for many, many years, even centuries

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There are about 10,000 different species of cnidarians

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they eat other animals. They use their tentacles to catch prey. Their tentacles have stinging cells called cnidocytes. They bring the food to their mouth and into their digestive cavity

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Cnidarians have stinging cells. the cells help them catch food and protect themselves. Corals build big underwater cities called reefs. Jellyfish can be really beautiful and come in lots of different colors and shapes