At least 131 species of crabs and lobsters (decapoda) have been recorded in South Australian marine waters, according to the Atlas of Living Australia. This list is provisional only, and is awaiting feedback from local marine invertebrate experts.
| Genus | Species | Common name | Described |
| Acanthonyx | euryseroche | 1986, Griffin & Tranter | |
| Actaea | calculosa | Facetted crab | 1834, H. Milne Edwards |
| Actumnus | setifer | Short-haired crab | 1835, De Haan |
| Alpheus | australiensis | 1982, Banner & Banner | |
| Alpheus | bidens | Mottled snapping prawn | 1811, Olivier |
| Alpheus | gracilis | 1861, Heller | |
| Alpheus | novaezealandiae | New Zealand snapping prawn | 1876, Miers |
| Alpheus | parasocialis | Social snapping shrimp | 1982, Banner & Banner |
| Alpheus | richardsoni | Snapping shrimp | 1971, Yaldwin |
| Alpheus | villosus | Hairy snapping shrimp | 1811, Olivier |
| Ancylocheles | gravelei | 1963, Sankolli | |
| Antarctus | mawsoni | 1938, Bage | |
| Arcania | elongata | 1933, Yokoya | |
| Athanas | granti | 1908, Coutière | |
| Athanas | parvus | 1910, de Man | |
| Austrodromidia | australis | Southern sponge crab | 1923, Rathbun |
| Austrodromidia | insignis | Adorned sponge crab | 1923, Rathbun |
| Austrodromidia | octodentata | Bristled sponge crab | 1882, Haswell |
| Austropenaeus | nitidus | 1947, Barnard | |
| Bellidilia | laevis | Smooth pebble crab | 1855, Bell |
| Betaeus | australis | 1860, Stimpson | |
| Brachynotus | spinosus | Little shore crab | 1853, H. Milne Edwards |
| Calliaxina | aequimanus | Ambidextrous burrower | 1907, Baker |
| Campylonotus | rathbunae | Sabre prawn (fao) | 1926, Schmitt |
| Carcinas | maenas | European shore crab | 1758, Linnaeus |
| Chaenostoma | punctulatus | Smooth sentinel crab | 1884, Miers |
| Cherax | destructor | Yabbie | 1936, Clark |
| Cherax | destructor albidus | White yabbie | 1936, Clark |
| Chlorotocella | gracilis | 1914, Balss | |
| Chlorotocella | spinicaudus | Slender-beaked prawn | 1837, H. Milne Edwards |
| Cryptocnemus | vincentianus | Tortoise-crab | 1927, Hale |
| Cyclograpsus | audouinii | Smooth shore crab | 1837, H. Milne Edwards |
| Cyclograpsus | granulosus | Purple-mottled shore crab | 1853, H. Milne Edwards |
| Dagnaudus | petterdi | Antlered crab | 1905, Grant |
| Dardanus | arrosor | Striated hermit crab | 1796, Herbst |
| Diogenes | senex | 1865, Heller | |
| Dromidiopsis | Shaggy sponge-crab | 1900, Borradaile | |
| Dumea | latipes | Velvet crab | 1880, Haswell |
| Ebalia | crassipes | Semi-smooth pebble crab | 1855, Bell |
| Ebalia | dentifrons | Chubby-cheeked crab | 1886, Miers |
| Ephippias | endeavouri | Endeavour crab | 1918, Rathbun |
| Galathea | australiensis | Striated craylet | 1858, Stimpson |
| Galathea | corallicola | 1882, Haswell | |
| Haledromia | bicavernosa | Eared sponge crab | 1888, Zietz |
| Halicarcinus | ovatus | Three-pronged sea spider | 1858, Stimpson |
| Halicarcinus | rostratus | Beaked sea-spider | 1881, Haswell |
| Helograpsus | haswellianus | Haswell’s shore crab | 1889, Whitelegge |
| Hippolyte | australiensis | Southern weed shrimp | 1860, Stimpson |
| Hippolyte | caradina | Little shrimp | 1947, Holthuis |
| Homola | orientalis | Carrier crab | 1888, Henderson |
| Huenia | halei | 1986, Griffin & Tranter | |
| Ibacus | alticrenatus | Deep water bug (Aust) | 1888, Bate |
| Ibacus | peronii | Balmain bug (Aust) | 1815, Leach |
| Jasus | edwardsii | Southern rock lobster | 1875, Hutton |
| Lamarckdromia | globosa | Shaggy sponge-crab | 1818, Lamarck |
| Latreutes | compressus | Green prawn | 1860, Stimpson |
| Leptograpsodes | octodentalus | Burrowing shore crab | 1837, H. Milne Edwards |
| Leptograpsus | variegatus | Swift-footed shore crab | 1793, Fabricius |
| Leptomithrax | gaimardii | Great spider crab | 1834, H. Milne Edwards |
| Leptomithrax | sternocostulatus | Ribbed Spider crab | 1851, H. Milne Edwards |
| Leptomithrax | waitei | 1900, Whitelegge | |
| Lithodes | longispina | 1971, Sakai | |
| Litocheira | bispinosa | Two-spined slender-clawed crab | 1856, Kinahan |
| Lomis | hirta | Hairy stone crab | 1818, Lamarck |
| Macrophthalmus (macrophthalmus) | crassipes | 1852, H. Milne Edwards | |
| Megametope | carinata | Crested forehead-crab | 1907, Baker |
| Megametope | rotundifrons | Smooth forehead crab | 1834, H. Milne Edwards |
| Melicertus | latisulcatus | Western king prawn | 1896, Kishinouye |
| Melicertus | plebejus | Eastern King prawn (Aust & Fao) | 1865, Hess |
| Metapenaeopsis | lindae | Linda’s velvet prawn | 1988, Manning |
| Metapenaeopsis | novaeguineae | Northern velvet prawn | 1879, Haswell |
| Microhalimus | deflexifrons | Decorator crab | 1880, Haswell |
| Micropagurus | acantholepis | Tiny hermit crab | 1858, Stimpson |
| Munida | chydaea | 2004, Ahyong & Poore | |
| Naxia | aries | Ramshorn crab | 1834, Guérin-Méneville |
| Naxia | aurita | Golden decorator crab | 1825, Latreille |
| Naxia | tumida | Little decorator crab | 1852, Dana |
| Nectocarcinus | integrifrons | Rough rock crab | 1825, Latreille |
| Nectocarcinus | tuberculosus | Rough rock crab | 1860, A. Milne Edwards |
| Neocallichirus | angelikae | 2000, Sakai | |
| Notiax | ceramica | Ceramic ghost shrimp | 1906, Fulton & Grant |
| Notomithrax | minor | Small decorator crab | 1885, Filhol |
| Notomithrax | ursus | Bear seaweed crab | 1788, Herbst |
| Ostracotheres | holothuriensis | Striped sea crab | 1907, Baker |
| Ostracotheres | subglobosus | Swollen pea crab | 1907, Baker |
| Ovalipes | australiensis | Common sand crab, Surf crab | 1968, Stephenson & Rees |
| Ozius | truncatus | Reef crab, Black-fingered crab | 1834, H. Milne Edwards |
| Paguristes | brevirostris | Southern hermit crab | 1905, Baker |
| Paguristes | frontalis | Common hermit crab | 1836, H. Milne Edwards |
| Paguristes | sulcatus | Hairy legged hermit crab | 1905, Baker |
| Pagurixus | handrecki | 1992, Gunn & Morgan | |
| Pagurixus | jerviensis | 1984, McLaughlin & Haig | |
| Palaemon | litoreus | Shore shrimp | 1909, McCulloch |
| Palaemon | serenus | Red handed shrimp, Rock-pool shrimp | 1862, Heller |
| Paragiopagurus | diogenes | 1900, Whitelegge | |
| Paragrapsus | quadridentatus | Four-toothed shore crab | 1837, H. Milne Edwards |
| Paramithrax | barbicornis | Sea Toad | 1825, Latreille |
| Parathranites | orientalis | 1886, Miers | |
| Pasiphaea | 1816, Savigny | ||
| Periclimenes | Anemone shrimp | 1844, Costa | |
| Philocheras | obliquus | Southern sand shrimp | 1902, Fulton & Grant |
| Philocheras | victoriensis | Victorian sand shrimp | 1902, Fulton & Grant |
| Pilumnopeus | serratifrons | Smooth-handed crab | 1856, Kinahan |
| Pilumnus | acer | Long-spined hairy crab | 1923, Rathbun |
| Pilumnus | etheridgei | Hairy crab | 1923, Rathbun |
| Pilumnus | kingstoni | Downy crab | 1923, Rathbun |
| Pilumnus | rufopunctatus | Red-spotted hairy crab | 1858, Stimpson |
| Pilumnus | tomentosus | Common hairy crab | 1825, Latreille |
| Pippacirama | tuberculosa | 1834, H. Milne Edwards | |
| Pisidia | dispar | Little porcelain crab | 1858, Stimpson |
| Plagusia | chabrus | Cleft-fronted shore crab | 1758, Linnaeus |
| Plesionika | martia | Golden shrimp | 1883, A. Milne Edwards |
| Portunus (portunus) | pelagicus | Blue Swimmer Crab | 1758, Linnaeus |
| Prismatopus | spatulifer | 1881, Haswell | |
| Pseudopontonia | minuta | Smooth prawn | 1907, Baker |
| Rhynchocinetes | australis | Hinge-beak shrimp | 1941, Hale |
| Rhynchocinetes | serratus | Hinged-beaked prawn | 1837, H. Milne Edwards |
| Schizophrys | rufescens | 1986, Griffin & Tranter | |
| Stimdromia | lamellata | Lamellate sponge crab | 1894, Ortmann |
| Stimdromia | lateralis | Ridged sponge crab | 1831, Gray |
| Strahlaxius | plectorhynchus | Slow shrimp | 1861, Strahl |
| Strigopagurus | elongatus | 1995, Forest | |
| Strigopagurus | strigimanus | Red hermit crab | 1847, White |
| Synalpheus | fossor | 1875, Paul’son | |
| Synalpheus | neomerus | 1897, de Man | |
| Synalpheus | streptodactylus | 1905, Coutière | |
| Synalpheus | tumidomanus | Fat-handed snapping shrimp | 1875, Paul’son |
| Tokoyo | eburnea | 1896, Alcock | |
| Tozeuma | 1860, Stimpson | ||
| Trachypenaeus | 1901, Alcock | ||
| Trachysalambria | curvirostris | Hardback prawn | 1860, Stimpson |
| Trigonoplax | longirostris | Triangle crab | 1908, McCulloch |
| Upogebia | 1814, Leach |
UPDATE LOG:
- 1 December 2016 – Dan Monceaux (completed links to ALA species pages and updated some common names)
- 26 December 2017 – Dan Monceaux (add two alternative common names: Surf crab and Black-fingered crab)
- 26 February 2018 – Dan Monceaux (added two species from genus Pagurixus)
I think I found the shell of a masked crab at South beach Port Broughton…it was crushed in my pocket .I googled what I thought I saw .
Are you able to provide any additional information about your find, Heather? We don’t have a “masked crab” on our local species list (unless that’s a less commonly used name).