At least 13 species of spider crabs have been recorded in South Australian waters, according to the Atlas of Living Australia. This list is provisional, owing to the absence of records from the South Australian Museum from the ALA’s database.
Sightings of the most common species can be found in this iNaturalist project.
| Genus | Species | Common name | Described |
| Leptomithrax | gaimardii | Great Spider Crab | 1834, H. Milne Edwards |
| Leptomithrax | sternocostulatus | Ribbed Spider crab | 1851, H. Milne Edwards |
| Leptomithrax | waitei | 1900, Whitelegge | |
| Microhalimus | deflexifrons | Decorator crab | 1880, Haswell |
| Naxia | aries | Ramshorn crab | 1834, Guérin-Méneville |
| Naxia | aurita | Smooth seaweed-crab | 1825, Latreille |
| Naxia | tumida | Little seaweed crab | 1852, Dana |
| Notomithrax | minor | Small seaweed crab | 1885, Filhol |
| Notomithrax | ursus | Bear seaweed crab | 1788, Herbst |
| Paramithrax | barbicornis | Sea Toad | 1825, Latreille |
| Pippacirama | tuberculosa | 1834, H. Milne Edwards | |
| Prismatopus | spatulifer | 1881, Haswell | |
| Schizophrys | rufescens | 1986, Griffin & Tranter |
Revision log:
- 27 April 2015 – Dan Monceaux
- 19 June 2019 – Dan Monceaux (added link to new iNaturalist project)
Hello we caught a spider crab today off the Wallaroo Jetty which was a surprise. Looking forward to eating it tomorrow. Kind regards Tracey
Thanks Tracey, but we discourage the eating of spider crabs. They are lovely creatures.