Permanent colonies of Australian sea-lions, Long-nosed fur seals and Australian fur seals exist in South Australian waters. The remaining listed species are occasional visitors.
| GENUS | SPECIES | COMMON NAME | DESCRIBED |
| Arctocephalus | forsteri | Long nosed fur seal | 1828, Lesson |
| Arctocephalus | pusillus | Australian fur seal | 1775, Schreber |
| Arctocephalus | tropicalis | Subantarctic fur seal | 1872, J.E. Gray |
| Hydrurga | leptonyx | Leopard seal | 1820, Blainville |
| Leptonychotes | weddelli | Weddell seal | 1826, Lesson |
| Lobodon | carcinophagus | Crabeater seal | 1842, Hombron & Jacquinot |
| Mirounga | leonina | Southern elephant seal | 1758, Linnaeus |
| Neophoca | cinerea | Australian sea-lion | 1816, Péron |
Compiled by Dan Monceaux, 6 December 2017.