Corals are animals that have calcified outer skeletons with sharp edges. Coral formations occur in tropical and subtropical waters. Because coral formations are rigid and sharp, injury can occur after accidental contact, leaving a small amount of animal protein and calcareous material in the wound. The small, harmless-appearing cut may quickly develop into an infected wound. Some corals contain nematocysts, which can produce a more significant injury (see Jellyfish Stings and Fire Coral Cuts).
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