Southern sand octopus (Octopus kaurna)
Source-cited species reference: taxonomy from WoRMS, biology from SeaLifeBase, occurrence map from GBIF, conservation from IUCN Red List, description from Wikipedia.
Octopus kaurna, also known as the southern sand octopus, is an octopus native to the waters around the Great Australian Bight and Tasmania. It has an arm span of up to 50 cm with long, unusually thin tentacles joined at the base by webbing and studded with small suckers. The species was first identified by Timothy Nathaniel Stranks. Kaurna is the name of an Australian Aboriginal clan which lived in the Adelaide region of South Australia.
- Scientific name
- Octopus kaurna
- Authority
- Stranks, 1990
- Family
- Octopodidae
- Order
- Octopoda
- Depth range
- 0–50 m
- Habitat zone
- benthic
- Iucn red list
- Data Deficient
- Gbif occurrence records
- 200
Classification (WoRMS)
Full classification as recorded by WoRMS: Kingdom: Animalia · Phylum: Mollusca · Class: Cephalopoda · Order: Octopoda · Family: Octopodidae · Genus: Octopus.
Accepted name: Octopus kaurna · Authority: Stranks, 1990 · Taxonomic status: accepted · AphiaID: 341988.
Source: World Register of Marine Species (WoRMS) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=341988 (CC BY 4.0). Accessed 2026-09-23.
Biology and life history (SeaLifeBase)
Measured values published by SeaLifeBase for Octopus kaurna. Only fields the database actually holds for this species are shown; these are database values, not aquarium guidance.
Depth range: 0–50 m · Habitat zone: benthic.
SeaLifeBase notes: Nocturnal hunter of small crustacean prey. Buries itself under sand during the day using mucous to bind sand grains together (Ref. 096968).
Source: SeaLifeBase species summary (SpecCode 57860) — https://www.sealifebase.se/summary/Octopus-kaurna.html (CC BY-NC 3.0 — non-commercial use only). Accessed 2026-09-23.
Distribution and occurrence records (GBIF)
200 georeferenced occurrence records for Octopus kaurna are published through GBIF from 1 countries or marine areas. The map above plots 18 distinct locations from a sample of 200 records, omitting 17 inland records that carry an institution's coordinates rather than a collection site; it shows where the species has been observed and reported, not a modelled range.
Most records by country or area: Australia (200).
Marine regions with a valid WoRMS distribution record: South West Pacific Ocean; Southeast Australian Shelf.
Source: GBIF Occurrence Search (taxonKey 2289655) — https://www.gbif.org/occurrence/search?taxon_key=2289655&has_coordinate=true (records CC0 / CC BY); WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=341988 (CC BY 4.0); Natural Earth 110m basemap — https://www.naturalearthdata.com/ (public domain). Accessed 2026-09-23.
Conservation status (IUCN Red List)
The IUCN Red List assesses Octopus kaurna Stranks, 1990 as Data Deficient (code DD). No trend, population estimate or threat analysis is given here, because none is available from this source without the Red List API; follow the source link for the full assessment, including its date.
Source: IUCN Red List of Threatened Species (taxon 163199) — https://www.iucnredlist.org/species/163199/0; GBIF IUCN Red List category endpoint (taxonKey 2289655) — https://api.gbif.org/v1/species/2289655/iucnRedListCategory. Accessed 2026-09-23.
Description and natural history (Wikipedia)
Unlike most octopuses, O. kaurna lacks color-changing chromatophors. However, it is able to hide from predators by burrowing itself in sand. The process begins with the octopus using its siphon to inject water into the sand, creating quicksand-like conditions which enable burrowing. Then, it uses its arms to burrow into the sand. Two arms will be extended to the surface, creating a ventilation shaft. At the same time, O. kaurna will use mucus to stabilize the shape of the burrow. Finally, the octopus will retract its two arms and push out loose sand with its siphon, creating a mucus-lined, ventilated burrow to rest in. While many octopuses bury themselves in a shallow layer of sediment for camouflage, O. kaurna is the only known species to exhibit sub-surface burrowing.
Source: Wikipedia: Octopus kaurna — https://en.wikipedia.org/wiki/Octopus_kaurna (CC BY-SA 4.0). Accessed 2026-09-23.
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