Sturisoma nigrirostrum 6 - (Sturisoma nigrirostrum) — 6-7cm

Overview

The freshwater fish uk species Sturisoma nigrirostrum, commonly known as the blacknose whiptail catfish or black nose whiptail, is a graceful, peaceful algae-grazing catfish native to the freshwaters of Peru and Bolivia. This slender species reaches just 5.5 cm in adult size, making it one of the smaller Sturisoma species available for sale UK. Found in the Ucayali, Marañón, Amazon, Orthon, Madre de Dios, Beni, Acre, and Madera river basins, Sturisoma nigrirostrum is adapted to well-oxygenated, flowing waters. Available from Tropical Fish Co, this charming whiptail catfish is prized for its unique shape, peaceful temperament, and effective biofilm-grazing behavior. This rare tropical fish uk is ideal for buy tropical fish UK enthusiasts seeking a small, manageable whiptail catfish for sale uk for well-oxygenated community aquariums with moderate water flow.

Appearance

Sturisoma nigrirostrum displays a slender, elongated body covered in rows of bony armor plates (scutes) that give the fish a distinctive, armored appearance. The base color is pale brown to tan with darker mottling and a characteristic dark or black snout (rostrum), giving the species its common name. The head is flattened with an elongated snout and a ventral sucker mouth. The tail is whip-like and extends into elongated filaments. Males develop bristles (odontodes) on the snout and pectoral fins as they mature, while females remain relatively smooth. Healthy specimens show clear eyes, smooth skin, intact fins, and a well-rounded body. Their subtle coloration and slender form make them a charming addition to planted aquariums.

Natural Habitat

In the wild, Sturisoma nigrirostrum inhabits clear to moderately turbid, fast-flowing rivers and streams across Peru and Bolivia, including the Ucayali, Marañón, Amazon, Orthon, Madre de Dios, Beni, Acre, and Madera river basins. The natural environment features warm, well-oxygenated water with rocky or sandy substrates, submerged wood, and abundant grazing surfaces covered in biofilm and aufwuchs. These fish cling to smooth surfaces such as rocks and driftwood, grazing on algae and organic matter. Natural conditions include moderate to strong water flow, high oxygen levels, and plenty of smooth surfaces for grazing. Replicating these conditions in captivity promotes natural behavior and long-term health.

Aquarium Setup

A minimum 100-litre aquarium is suitable for Sturisoma nigrirostrum, though larger tanks are always preferable for maintaining stable water quality and providing ample grazing surfaces. Provide plenty of smooth driftwood, flat stones, and broad-leaved plants such as Amazon sword or Anubias to create grazing surfaces. The tank should have moderate to strong water flow to replicate natural river conditions. Use a soft substrate such as fine sand or smooth gravel. Robust filtration with good oxygenation is critical—consider powerheads or additional water movement to ensure high oxygen levels. A tightly fitted lid is recommended, as these fish may jump if startled. Subdued to moderate lighting is preferred, and live plants should be securely anchored.

Water Parameters

Blacknose whiptail catfish thrive in water with a pH of 6.0-7.5 and temperatures between 24-28°C. Maintain excellent water quality with weekly partial water changes of 30-40%, keeping ammonia and nitrite at zero and nitrate below 20 ppm. Soft to moderately hard water is preferred, replicating natural South American river conditions. Use a reliable heater and thermometer to maintain stable conditions. Ensure the tank is well-oxygenated with strong filtration and good surface agitation or additional water movement. As a facultative air breather, Sturisoma nigrirostrum still requires well-oxygenated water for optimal health. Regular maintenance and stable parameters are essential for long-term health and whiptail catfish breeding success.

Feeding

Sturisoma nigrirostrum is primarily a biofilm and algae grazer with detritivore tendencies. Provide mature tank surfaces with established biofilm, algae wafers, spirulina-based sinking foods, and blanched vegetables such as zucchini and cucumber as staple foods. Supplement sparingly with limited supplemental protein if accepted, though the diet should remain predominantly vegetable-based. They will graze continuously on biofilm and aufwuchs growing on driftwood and other surfaces. Feed small amounts of supplemental food once or twice daily, ensuring uneaten vegetables are removed after 24 hours. A mature tank with established biofilm is essential—do not rely solely on supplemental feeding. A balanced, vegetable-rich diet supports healthy growth, coloration, and robust immune function.

Behaviour

Sturisoma nigrirostrum is a peaceful, slow-moving species that spends most of the time clinging to smooth surfaces such as driftwood, rocks, or aquarium glass, grazing on biofilm and algae. They are most active during the evening and night but may also be visible during the day in well-established, stress-free aquariums. Despite their slender appearance, they are non-aggressive and pose no threat to other tank inhabitants. Their elegant, deliberate movements and unique shape make them fascinating to observe. They are shy and may hide if the tank is too bright or if there is excessive disturbance. Their calm temperament makes them well-suited to peaceful whiptail catfish care community setups.

Tank Mates

Ideal tank mates for blacknose whiptail catfish include peaceful small to medium community fish such as tetras, rasboras, Corydoras catfish, and small peaceful dwarf cichlids like Apistogramma species. Avoid large aggressive cichlids, fin-nipping fish, highly territorial bottom dwellers, and very boisterous species that outcompete them for food. Multiple Sturisoma nigrirostrum can be kept together in sufficiently large tanks (150+ litres) with ample hiding spots and grazing surfaces. Shrimp and snails coexist well. Their peaceful nature and small size make them ideal for mature, planted south american catfish for sale community setups with other calm, non-aggressive species that share similar water requirements.

Breeding

Sturisoma nigrirostrum breeding in captivity is uncommon but possible in well-maintained, mature aquaria with excellent water quality, strong filtration, and a varied vegetable-rich diet. Males typically guard eggs laid on smooth surfaces such as rocks, PVC tubes, or broad plant leaves, fanning them to ensure oxygenation and protect them from fungus. Condition breeding pairs with a varied diet including spirulina, algae wafers, and blanched vegetables. Slightly cooler water changes (1-2°C drop) and increased water flow may trigger spawning. Eggs hatch in 7-10 days, and fry require clean water, high oxygen levels, and very fine foods such as crushed algae wafers or specialized fry foods. Breeding attempts should only be undertaken by experienced aquarists.

Why Buy from Tropical Fish Co

Tropical Fish Co is your trusted source for healthy, captive-bred blacknose whiptail catfish for sale UK, including the elegant Sturisoma nigrirostrum. Each fish is quarantined, health-checked, and carefully acclimatized before dispatch, ensuring you receive robust, disease-free specimens ready to thrive in your aquarium. Our expert team provides personalized care advice, aquarium setup guidance, and ongoing support to help you succeed with these fascinating buy sturisoma nigrirostrum online uk. With secure packaging, next-day delivery across the UK, and a commitment to sustainable aquarium practices, Tropical Fish Co is the best place to buy freshwater tropical fish online UK. Whether you're building a South American biotope tank or seeking a graceful, unique addition to your community setup, our blacknose whiptail catfish deliver both charm and function.