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Fire & Ice tends to be a catch-all term for a wide variety of red and blue zoas. (Frequently you’ll see the same zoas identified as Snitches.) Generally any no-name blue zoa with a red skirt and light center can get classified as a Fire & Ice. They can run the gamut from small polyps to large polyps and are easy, fast growers in most reef aquariums. They tend to look the same across most all tank conditions.