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Transverse sections of four species of Acropora showing polyps undergoing early and late‐stage oocyte (oo) development in the build up to ex situ spawning. (a) Singapore, (i) Acropora hyacinthus, showing AH12. (b) Great Barrier Reef, (i) Acropora millepora, showing AM1, (ii) Acropora microclados, showing AMIC5, (iii) Acropora tenuis, showing AT7. Scale 1 mm
