Labels:book | bulletin board | dialog box | poster | windowpane OCR: CNIDARIANS Hydroids The hydroids include several groups of animals. The best known are the fire corals or millepora, polyplike creatures that superficially resemble hard corals and secrete calcifer- ous shell As they settle on the ocean bottom and form colonies the millepora create curtainlike structures that resemble hard corals but flour- ish in areas where hard corals cannot Like all members this phylum, fire corals have 1 OF 3 botton arees
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