noun
a type of marine invertebrate that belongs to the phylum Cnidaria, characterized by a cylindrical body with tentacles surrounding a central mouth
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Actinizoa is a class of marine animals that includes sea anemones and corals.
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I learned about actinizoa in my marine biology class.
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Some people call actinizoa 'flower animals' because of their appearance.
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The actinizoa of the ocean sway gently in the currents, like dancers in a ballet.