HomeFreshwater aquarium fishCatfish & plecosAcanthicus adonis Acanthicus adonis Scientific name: Acanthicus adonis Isbr?cker & Nijssen, 1988 Acanthicus adonis is a freshwater fish of the family Loricariidae that grows to about 40.6 cm (16 in). It is easy to keep and semi-aggressive, needs carefully chosen tank mates and needs water at 24–27°C (75–81°F) and a pH of 6.0–7.0. Native range: South America, Brazil- native to Tocantins River. Acanthicus adonis care at a glanceCare levelEasyTemperamentSemi-aggressiveCommunity tankWith cautionAdult size40.6 cm (16 in)Temperature24–27°C (75–81°F)pH6.0–7.0Hardness5–12 dGH (89–214 ppm)DietOmnivore. Accepts pellets, algae wafers, live foods and vegetables. Species factsScientific nameAcanthicus adonisFamilyLoricariidae (Armored catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length20.6EnvironmentFreshwater;; pH range: 6.0 - 7.0; dH range: 5 - 12 demersalClimateTropicalDistributionSouth America: Lower Tocantins River basin.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercial More catfish & plecosChocolate-colored catfishRineloricaria lanceolataOtocinclus vestitusAncistrus temminckiiDekeyseria pulchraDekeyseria brachyuraHypostomus cochliodonSee all catfish & plecos SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0. Aquarium care parameters compiled, checked and converted to metric and imperial units by Guppies.za.net.Last updated 28 September 2026