The term CORALS, E.G. can be solved by the 6-letter word POLYPS. Corals are marine invertebrates that form part of the Cnidaria phylum and are closely related to jellyfish and anemones. They are composed of individual polyps, which are small, soft-bodied organisms that secrete a hard calcium carbonate skeleton. This skeleton provides structure and protection for the coral and also serves as a base for the growth of new polyps.