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In general, corals lose relatively small patches of tissue, then
the disease becomes dormant, but colonies may be reinfected in a
new location at a later date. After several infection events, A.
palmata branches are a mosaic of live tissue interspersed with
white, recently killed areas and older lesions colonized by turf
algae. Once tissue mortality stops, living tissue that surrounds
the lesion grows inward, progressively healing over the lesion.
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Colony
of elkhorn coral with new areas affected by patchy necrosis, areas
that previously died and areas that are showing tissue regrowth
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