Tandanus tandanus  (Mitchell, 1838)

Freshwater catfish
Upload your photos and videos
Pictures | Google image
Image of Tandanus tandanus (Freshwater catfish)
Tandanus tandanus
Picture by Coughran, J.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Siluriformes (Catfish) > Plotosidae (Eeltail catfishes)
Etymology: Tandanus: A local name, tandan, in Australia.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; demersal; potamodromous (Ref. 51243); depth range 10 - ? m.   Temperate; 5°C - 25°C (Ref. 2060); 12°S - 43°S

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Oceania: endemic to Australia.

Length at first maturity / Size / Weight / Age

Maturity: Lm 45.0  range ? - ? cm
Max length : 90.0 cm TL male/unsexed; (Ref. 5259); common length : 45.0 cm TL male/unsexed; (Ref. 5259); max. published weight: 6.8 kg (Ref. 36739); max. reported age: 8 years (Ref. 1107)

Short description Morphology | Morphometrics

Head large; thick and fleshy lips; nostrils tubular. First dorsal fin high, with a strong serrated spine and 6 rays. Skin tough and smooth. Body coloration in adults vary from olive-green to brown, black or purplish dorsally and white ventrally. Urogenital papilla triangular in females; longer and cylindrical in males.

Biology     Glossary (e.g. epibenthic)

Adults inhabit slow moving streams, lakes and ponds with fringing vegetation. They swim close to sand or gravel bottoms. More abundant in lakes than in flowing water (Ref. 44894). Usually solitary but juveniles sometimes form loose aggregations. Mainly bottom-feeders (Ref. 44894). Feed on insect larvae, prawns, crayfish, mollusks, and small fishes. Breeding occurs between spring and mid-summer when water temperatures rise to between 20° and 24°C (Ref. 44894). Utilized for human consumption.

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Water temperature (20-24 °C) considered the primary spawning stimulus. There is direct pairing during spawning. Male builds nest (0.6-2.0 m in diameter) and cares for eggs in the nest up to 2 weeks. The nest is made of gravel and rocks with a central sandy depression in which the female deposits up to 20,000 eggs depending on her size (Ref. 5259). Eggs scattered into the rubble are tended and guarded by the male after the female departs (Ref. 205). Hatching occurs in 7-10 days at 18°C (Ref. 240).

Main reference Upload your references | References | Coordinator | Collaborators

Allen, G.R., 1989. Freshwater fishes of Australia. T.F.H. Publications, Inc., Neptune City, New Jersey. (Ref. 5259)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Venomous (Ref. 4537)

Human uses

Fisheries: commercial; gamefish: yes; aquarium: commercial
FAO(Publication : search) | FishSource |

More information

Larval dynamics
Aquaculture profile
Allele frequencies
Mass conversion
Stamps, Coins Misc.
Swim. type
Gill area


Special reports

Download XML

Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5625   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00832 (0.00339 - 0.02042), b=3.06 (2.85 - 3.27), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic Level (Ref. 69278):  3.3   ±0.48 se; Based on food items.
Resilience (Ref. 69278):  Low, minimum population doubling time 4.5 - 14 years (tm=5; K=0.10).
Prior r = 0.35, 2 SD range = 0.13 - 0.95, log(r) = -1.05, SD log(r) = 0.5, Based on: 2 K, 1 tgen, 1 tmax, 2 Fec records
Vulnerability (Ref. 59153):  Moderate vulnerability (37 of 100) .
Price category (Ref. 80766):   Unknown.