Bristle-Nose catfish red+black (Ancistrus sp. red + black) — 2,5-3cm

Overview

The Bristle-Nose Catfish Red + Black (Ancistrus sp. red + black) is a striking and highly functional freshwater catfish that combines eye-catching bicolour patterning with exceptional algae-eating abilities. This small catfish is one of the most popular choices for community aquariums, valued for its peaceful temperament, compact adult size, and role as a natural aquarium cleaner. The red and black colour morph is particularly attractive, displaying a dramatic contrast of deep black body colouration accented with vivid red or orange hues on the fins and body. Reaching an adult size of approximately 15cm, the bristlenose pleco is perfectly suited to medium-sized aquariums and is an excellent choice for beginner aquarists seeking low-maintenance, beneficial fish. For those seeking tropical fish for sale UK-wide, the Red + Black Bristle-Nose Catfish is an outstanding addition to any community setup.

Appearance and Red + Black Colouration

The Red + Black Bristle-Nose Catfish displays a stunning bicolour pattern with a deep black or dark brown base body colour accented by vivid red, orange, or reddish-brown hues on the fins, particularly the dorsal, pectoral, and caudal fins. The exact intensity and distribution of red colouration varies between individuals and can intensify with age, diet, and optimal water conditions. The body is armoured with bony plates, and the head is broad and flattened. Males develop prominent bristles (tentacle-like growths) on the snout and head, particularly as they mature, while females have minimal or no bristles. Juveniles at 2.5-3cm display early colour patterning but will develop more intense hues and, in males, bristles as they mature. Healthy specimens display active foraging behaviour, smooth intact armour plating, clear eyes, and vibrant fin colouration. The combination of black body and red fins creates a dramatic, visually striking appearance that stands out in planted or community aquariums.

Natural Habitat and Distribution

While the exact wild origin of this red + black colour morph is not specified, Ancistrus species are native to South America, where they inhabit rivers, streams, and tributaries with moderate to fast-flowing water. These habitats are typically characterised by rocky substrates, submerged driftwood, abundant algae growth, and clear to slightly turbid water. Ancistrus catfish are well-adapted to grazing algae and biofilm from rocks and wood, using their specialised suckermouth. Water conditions in nature vary but are generally soft to moderately hard with neutral to slightly acidic pH. Many colour morphs, including the red + black variety, are the result of selective breeding in captivity. Understanding the general ecology of wild Ancistrus species is helpful for replicating suitable conditions in the aquarium.

Aquarium Setup and Environmental Needs

A minimum aquarium size of 80 litres is recommended for the Red + Black Bristle-Nose Catfish, with larger tanks preferred for community setups or breeding groups. The substrate should be fine sand or smooth rounded gravel, and the aquarium should be furnished with plenty of driftwood, smooth rocks, caves (such as terracotta pots, PVC tubes, or slate structures), and live plants. Driftwood is particularly important, as Ancistrus catfish rasp wood fibres as part of their diet to aid digestion. Provide multiple hiding places and caves, especially if keeping breeding pairs or groups. Filtration should be efficient and capable of creating moderate water flow; use a canister filter or hang-on-back filter. Water flow should be moderate, replicating the flowing streams of their natural habitat. Lighting can be moderate, though the species is somewhat nocturnal and will be more active during evening and night hours. Ensure the aquarium is well-covered, as catfish can occasionally climb glass or decor and may escape from open-top tanks.

Water Parameters and Quality

The Red + Black Bristle-Nose Catfish is hardy and adaptable, tolerating a range of water parameters. Temperature should be kept between 23-29°C, with 25-27°C being ideal. pH should range from 6.0-7.5, with neutral to slightly acidic values preferred. Water hardness can be soft to moderately hard; the species is adaptable to a wide range. Ammonia and nitrite must always be at zero, and nitrates should be kept below 20ppm through regular partial water changes of 20-30% weekly and efficient biological filtration. While hardy, the species still requires clean, well-oxygenated water to thrive. Use a high-quality test kit to monitor parameters regularly, and ensure filtration is well-maintained. Provide good oxygenation and moderate water flow. The species is relatively forgiving of minor parameter fluctuations, making it an excellent choice for beginner aquarists.

Feeding and Omnivorous Diet

The Red + Black Bristle-Nose Catfish is an omnivore with a strong preference for algae and plant matter. In the aquarium, the species will graze continuously on algae, biofilm, and aufwuchs growing on rocks, glass, driftwood, and decor. Supplement the natural grazing diet with high-quality sinking algae wafers, spirulina-based pellets, blanched vegetables (such as courgette, spinach, cucumber, or peas), and occasional protein foods such as frozen bloodworms or brine shrimp. Feed small amounts once daily in the evening, as the species is most active during low-light periods. Ensure food reaches the substrate where the catfish feed. A varied, balanced diet supports healthy growth, vibrant fin colouration, and successful breeding. Driftwood is an essential dietary component and should always be present in the tank. Avoid overfeeding, and remove uneaten food promptly to prevent water quality degradation.

Behaviour and Peaceful Temperament

The Red + Black Bristle-Nose Catfish is a peaceful, shy species that spends much of its time hiding in caves or grazing on surfaces. The species is primarily nocturnal but will venture out during the day, particularly at feeding time or in well-established, low-stress aquariums. Males can be mildly territorial toward one another, particularly in smaller tanks or when breeding, but aggression is generally limited to displays and posturing rather than serious fighting. Females are entirely peaceful. The species is entirely non-aggressive toward other fish and will not bother tank mates, making it an ideal addition to community aquariums. Observing the industrious grazing behaviour and watching males develop impressive bristles as they mature is one of the pleasures of keeping this species. Provide plenty of hiding places to reduce stress and encourage natural behaviour.

Compatible Tank Mates

The Red + Black Bristle-Nose Catfish is an excellent community fish, compatible with a wide range of peaceful species. Ideal tank mates include tetras, rasboras, barbs, danios, livebearers, peaceful cichlids (such as Apistogramma or angelfish), other peaceful catfish, loaches, and shrimp (though fry may be at risk). Avoid large aggressive fish, fin-nippers, and any species that may harass or stress the catfish. The species is generally peaceful toward all tank mates and will not compete aggressively for food. Because of its algae-eating abilities and peaceful nature, the bristlenose is one of the most universally compatible aquarium fish available. A well-planned community featuring a variety of peaceful species from different swimming levels is the ideal setting. Ensure ample hiding places and caves for the catfish to retreat to when needed.

Breeding and Cave Spawning

The Red + Black Bristle-Nose Catfish breeds readily in captivity, making it an excellent choice for aquarists interested in breeding. Provide a bonded pair (or one male with 2-3 females) and multiple caves or tubes where the male can establish a breeding territory. Males choose and defend a preferred cave, and females lay adhesive eggs inside. The male guards and fans the eggs, which hatch in 4-7 days depending on temperature. Fry remain attached to the cave walls for a further few days before becoming free-swimming. The male continues to guard the fry for a short period after hatching. Fry can be fed on finely crushed algae wafers, spirulina powder, and newly hatched brine shrimp. For best fry survival, provide plenty of hiding places and ensure water quality is excellent. Breeding bristlenose catfish is straightforward and highly rewarding, offering a fascinating insight into parental care behaviours.

Why Buy from Tropical Fish Co

Tropical Fish Co is proud to offer healthy, vibrant Red + Black Bristle-Nose Catfish sourced from trusted breeders and carefully quarantined to ensure peak condition upon arrival. Every fish is inspected for health, colour, and vitality before dispatch, and we provide expert advice and ongoing support to help you create the ideal community aquarium. With fast, reliable delivery across the UK and a commitment to customer satisfaction, Tropical Fish Co is your trusted partner for bristlenose pleco for sale UK-wide. Whether you're setting up your first aquarium, adding functional algae eaters to an established tank, or seeking colourful, easy-to-keep catfish for a community setup, our team is here to help you succeed. Shop with confidence and discover the beauty and utility of the Red + Black Bristle-Nose Catfish from Tropical Fish Co.