HomeFreshwater aquarium fishOther freshwater fishTandan catfish Tandan catfish (Tandanus tandanus) Scientific name: Tandanus tandanus Mitchell, 1838 The Tandan catfish (Tandanus tandanus) is a freshwater fish of the family Plotosidae. In the aquarium it needs water at 5–25°C (41–77°F). Native range: Oceania, endemic to Australia. Tandan catfish care at a glanceTemperature5–25°C (41–77°F) BiologyAdults 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. Usually solitary but juveniles sometimes form loose aggregations. Mainly bottom-feeders. 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. Utilized for human consumption.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameTandanus tandanusFamilyPlotosidae (Eeltail catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length90.0Common length45.0Depth range10 m (33 ft)EnvironmentFreshwater; demersal; potamodromous; depth range 10 - ? mClimateTemperateDistributionOceania: endemic to Australia.Conservation status (IUCN)Not EvaluatedThreat to humansVenomousUsesFisheries: commercial; gamefish: yes; aquarium: commercialResilienceLow, minimum population doubling time 4.5 - 14 years (tm=5; K=0.10) More other freshwater fishFinescale tigerfishDatnioides microlepisFreshwater garfishXenentodon cancilaShort-tailed pipefishMicrophis brachyurus brachyurusPumpkinseedLepomis gibbosusLined soleAchirus lineatusSouth American lungfishLepidosiren paradoxaSee all other freshwater fish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026