Records held by the Atlas of Living Australia show that at least 32 species of sea urchins have been sighted in South Australian waters. In order to minimise the threat of erroneous records falsely extending this list, I’ve only included species for which at least two sighting records were found.
| GENUS | SPECIES | COMMON NAME | DESCRIBED |
| Amblypneustes | elevatus | Sea urchin | 1872, Hutton |
| Amblypneustes | formosus | Sea urchin | 1846, Valenciennes |
| Amblypneustes | grandis | 1912, H.L. Clark | |
| Amblypneustes | leucoglobus | Sea urchin | 1914, Döderlein |
| Amblypneustes | ovum | Sea urchin | 1816, Lamarck |
| Amblypneustes | pallidus | 1816, Lamarck | |
| Ammotrophus | cyclius | 1928, H.L. Clark | |
| Breynia | australasiae | 1815, Leach | |
| Brissus | agassizii | Sea urchin | 1885, Döderlein |
| Centrostephanus | tenuispinus | Western longspine sea urchin | 1914, H.L. Clark |
| Echinocardium | cordatum | Heart urchin | 1777, Pennant |
| Echinocyamus | platytatus | Sea urchin | 1914, H.L. Clark |
| Evechinus | chloroticus | 1846, Valenciennes | |
| Genocidaris | incerta | Sea urchin | 1928, H.L. Clark |
| Goniocidaris | impressa | Sea urchin | 1926, Koehler |
| Goniocidaris | tubaria | Sea urchin | 1816, Lamarck |
| Gracilechinus | multidentatus | 1925, H.L. Clark | |
| Granobrissoides | dyscritus | Heart urchin | 1938, H.L. Clark |
| Heliocidaris | erythrogramma | Purple sea urchin | 1846, Valenciennes |
| Holopneustes | inflatus | Seagrass sea urchin | 1872, Lütken |
| Holopneustes | porosissimus | Red-spined sea urchin | 1846, L. Agassiz |
| Holopneustes | purpurascens | Sea urchin | 1872, A. Agassiz |
| Microcyphus | annulatus | Sea urchin | 1904, Mortensen |
| Microcyphus | compsus | Sea urchin | 1912, H.L. Clark |
| Microcyphus | zigzag | Sea urchin | 1846, L. Agassiz |
| Pachycentrotus | australiae | 1872, A. Agassiz | |
| Peronella | peronii | Sea urchin | 1841, L. Agassiz |
| Phormosoma | bursarium | 1881, A. Agassiz | |
| Phyllacanthus | irregularis | Sea urchin | 1928, Mortensen |
| Protenaster | australis | Heart urchin | 1851, Gray |
| Temnopleurus | michaelseni | 1914, Döderlein | |
| Temnopleurus | toreumaticus | 1778, Leske |
Compiled by Dan Monceaux, 5 December 2017