In addition to the reef itself ​ — actually a series of reefs — ​ the reserve includes some 450 cays, or islets, and three coral atolls, ring - shaped reefs enclosing picturesque lagoons.
Lisaks korallrahudele kuulub kaitseala hulka ka umbes 450 korallsaart ja kolm maalilise laguuniga atolli ehk rõngassaart.