Triradiatus Bristlenose Care Guide
Ancistrus triradiatus is a hardy bristlenose from Colombian and Venezuelan streams, a peaceful, mostly herbivorous algae grazer for community tanks.
Compiled by Aquairi from published sources · Published · Updated
Overview
Ancistrus triradiatus is an armoured catfish of the family Loricariidae and one of the more commonly traded bristlenose plecos. Seriously Fish gives a maximum size of about 12 cm; FishBase reports around 9.2 cm standard length. It is a hardy, bottom-dwelling, facultative air-breathing fish.
Taxonomy
- Family: Loricariidae
- Genus: Ancistrus
- Scientific name: Ancistrus triradiatus
- Order: Siluriformes
Habitat
Seriously Fish records the species from Colombia and Venezuela. FishBase details middle and lower Orinoco tributaries, the Valencia Lake and Los Guayos River basins, and southern tributaries of Lake Maracaibo. It inhabits flowing streams and tributaries with rocky substrates.
Tank requirements
- Minimum tank volume: 150 L
- Temperature: 24-28 °C (75-82 °F)
- pH: 6.0-7.5
- GH: 2-12 °dGH
- Lifespan: 8-12 years
- Decor: driftwood, caves and rocks with moderate flow
Diet
An omnivore with a strong herbivorous bias. Seriously Fish recommends a primarily vegetarian diet of fresh vegetables such as cucumber and spinach plus dried foods like algae wafers and Spirulina tablets, supplemented occasionally with live or frozen bloodworm or Daphnia.
Compatibility
Seriously Fish describes it as peaceful and suitable for most peaceful community tanks, with characins, peaceful South American cichlids and small catfish as ideal companions. It is territorial toward conspecifics, though multiple can coexist in larger setups; other territorial plecos are best avoided.
Breeding
Seriously Fish reports it as an easily matured cave-spawner in which the male guards the eggs and fry. Eggs hatch in about 4-5 days, with broods often numbering 40-50 or more fry that need abundant vegetable food once they leave the cave. Males develop full, bushy head tentacles, while females have few or none.
Conservation status
IUCN Red List: Least Concern, assessed 2020 (per FishBase).
Breeding Ancistrus triradiatus
Overview
Ancistrus triradiatus is a bristlenose loricariid from Colombia and Venezuela; Wikipedia records it from the Orinoco drainage, the Los Guayos River, Lake Valencia and Lake Maracaibo and lists it as Least Concern. Seriously Fish describes it as peaceful but territorial with conspecifics and a cave spawner. Reported sizes vary between sources (about 9-12 cm).
Sexing
Only the males develop the full, bushy growth of tentacles covering the head; females may have a few tentacles but far fewer than males.
Conditioning
The species is mainly vegetarian, taking algae wafers and vegetables with occasional live and frozen foods, and conditioning the breeders on a varied diet supports egg production.
Breeding Setup
Seriously Fish recommends well-oxygenated water with strong movement and caves as spawning sites, at a temperature of 75-80 F (about 24-27 C) and pH 6.0-6.5.
Spawning Behavior & Trigger
Males establish and defend cave territories while females deposit eggs inside. The male then provides sole parental care, fanning the clutch vigorously with his fins and defending the cave against intruders.
Egg & Fry Care
Eggs are large and orange and hatch in 4-5 days, after which the fry remain in the cave for several more days until their yolk sacs are consumed. The fry then need heavy feedings of greenstuffs such as blanched spinach, cucumber slices and algae wafers, with food available at all times as they are voracious feeders. Expected brood size is 40-50 or more fry.
Common Challenges
Although peaceful in a community, the species is territorial with its own kind, so competing males can disrupt spawning if cave space is limited; provide ample caves and maintain strong water movement throughout brood care.