Rock oyster

Rock oysters are true oysters of the genus Saccostrea, belonging to the subfamily Saccostreinae of the family Ostreidae.

The best-known species is the Sydney rock oyster (Saccostrea glomerata).

Species
The World Register of Marine Species lists these species:
 * Saccostrea circumsuta (Gould, 1850)
 * Saccostrea cucullata (Born, 1778) – hooded oyster
 * Saccostrea echinata (Quoy & Gaimard, 1835) – tropical black-lip rock oyster
 * Saccostrea glomerata (Gould, 1850) - Sydney rock oyster
 * Saccostrea kegaki Torigoe & Inaba, 1981
 * Saccostrea malabonensis (Faustino, 1932) – Philippine hooded oyster (talabang kukong kabayo)
 * Saccostrea mordoides Z.-M. Cui, L.-S. Hu, C. Li, Z. Zhang, X.-M. Guo & H.-Y. Wang, 2021
 * Saccostrea palmula (Carpenter, 1857)
 * † Saccostrea saccellus (Dujardin, 1837)
 * Saccostrea scyphophilla (Peron & Lesueur, 1807)
 * Saccostrea spathulata (Lamarck, 1819)
 * Saccostrea subtrigona (G.B. Sowerby II, 1871)
 * † Saccostrea virleti (Deshayes, 1835)
 * Synonyms:
 * Saccostrea commercialis (Iredale & Roughley, 1933) : synonym of Saccostrea glomerata (Gould, 1850)
 * Saccostrea cucullata [sic]: synonym of Saccostrea cuccullata (Born, 1778) (misspelling)
 * Saccostrea forskahlii (Gmelin, 1791) : synonym of Saccostrea cuccullata (Born, 1778)
 * Saccostrea margaritacea (Lamarck, 1819) : synonym of Striostrea margaritacea (Lamarck, 1819)
 * Saccostrea mordax (Gould, 1850) : synonym of Saccostrea scyphophilla (Peron & Lesueur, 1807)
 * Saccostrea tubulifera (Dall, 1914) : synonym of Saccostrea palmula (Carpenter, 1857)