Flathead Cichlid, Buffalohe (Steatocranus casuarius) — 5,5-6cm

Overview

The Steatocranus casuarius, variously known as the Lionhead Cichlid, Buffalohead, or Flathead Cichlid, is one of Central Africa's most distinctive species, famous for the prominent cranial hump (nuchal hump) that develops on mature males. Reaching 8 cm and requiring a minimum 100-litre aquarium, this rheophilic (current-loving) Congo River species delivers fascinating behavior including characteristic "hopping" locomotion rather than typical swimming. With semi-aggressive temperament and preference for well-oxygenated water with moderate current, the Buffalohead rewards keepers who create river-biotope aquariums with rocky structure and compatible tankmates. Available for sale UK from Tropical Fish Co, this freshwater fish uk brings authentic Central African character to aquariums, offering experienced keepers a truly unique species with personality and behavior unlike any other commonly available cichlid.

Appearance

Steatocranus casuarius displays immediately distinctive appearance due to the prominent cranial hump (gibbosity) developing on mature males—giving rise to common names including Buffalohead and Lionhead. This fatty tissue deposit creates a pronounced forehead bulge that becomes increasingly prominent with age and dominance status. Base coloration ranges from tan to grey-brown with irregular darker mottling or barring, providing camouflage against rocky substrates. Males develop more pronounced humps and slightly larger size than females, though both sexes show the species' characteristic deep-bodied, somewhat flattened proportions adapted for life in fast-flowing water. The reduced swim bladder size—an adaptation to rheophilic lifestyle—gives the species its characteristic "hopping" or "walking" locomotion across the substrate rather than swimming in midwater, creating unique visual appeal unlike any other commonly kept cichlid.

Natural Habitat

This species inhabits Pool Malebo and rapids sections of the Congo River in Central Africa, occupying areas with strong current, high oxygen levels, and rocky substrates. These rheophilic (current-loving) environments feature fast-flowing water over boulder-strewn rapids where the species shelters between rocks, feeds on aufwuchs and small invertebrates, and spawns in caves. Water chemistry in the Congo River tends toward soft to moderately hard, slightly acidic to neutral (pH 6.0-7.5), with temperatures in the mid-20s Celsius. The species' reduced swim bladder and powerful body musculature represent evolutionary adaptations allowing it to maintain position in strong current without being swept downstream. Replicating these specialized conditions—particularly excellent oxygenation and moderate current—is essential for long-term success in aquariums.

Aquarium Setup

A 100-litre aquarium provides adequate space for a pair of Steatocranus casuarius, with larger volumes supporting additional compatible tankmates. Create a Congo River rapids biotope using smooth rocks and river stones arranged to form caves, overhangs, and open areas, ensuring structures are extremely stable—this powerful species can dislodge poorly secured decorations. Provide a sandy or fine substrate preventing injury to fish that spend substantial time on the bottom. Hardy plants such as Anubias and Java fern can be included, attached to rocks or driftwood rather than planted in substrate. Install powerful filtration providing 8-10x tank volume turnover per hour, creating moderate directional current replicating river flow. Excellent oxygenation through surface agitation or airstones is essential—this rheophilic species requires high dissolved oxygen levels. Subdued lighting reduces stress for this cave-spawning species adapted to shaded rocky environments.

Water Parameters

Maintain water conditions reflecting the Congo River basin: temperatures between 24-28°C and pH values from 6.0-7.5 in soft to moderately hard water (5-15 dGH). While reasonably adaptable compared to some specialized species, stability remains crucial. Conduct weekly 30% water changes to control organic accumulation and maintain excellent water quality—rheophilic species evolved in pristine, oxygen-rich rapids and tolerate pollution poorly. Ammonia and nitrite must always measure 0 ppm, with nitrates kept below 40 mg/L through diligent maintenance. Dissolved oxygen should remain high through efficient gas exchange from surface agitation or supplemental aeration. Test parameters weekly initially until stability is demonstrated, then fortnightly thereafter. The species' specialization for fast-flowing, well-oxygenated water means it's less tolerant of declining water quality than many cichlids.

Feeding

As an omnivore, Steatocranus casuarius requires varied nutrition including both meaty and vegetable components. Offer high-quality cichlid pellets or sinking granules as the staple, supplemented regularly with frozen and live foods including bloodworms, brine shrimp, daphnia, and small insect larvae. Include some vegetable matter such as spirulina-based foods or blanched vegetables to ensure dietary fiber and complete nutrition. Feed once or twice daily in portions consumed within 2-3 minutes, sinking foods being essential given the species' bottom-dwelling lifestyle. The species' characteristic foraging behavior—moving across the substrate investigating caves and crevices for food—creates constant activity. Avoid overfeeding as declining water quality particularly affects rheophilic species requiring pristine conditions.

Behaviour

Steatocranus casuarius displays semi-aggressive territorial behavior, with pairs or individuals establishing territories centered on preferred caves. Males become particularly territorial when breeding, defending spawning caves vigorously against intruders. The species' most distinctive behavioral trait is its characteristic "hopping" or "walking" locomotion across the substrate using exaggerated pelvic fin movements rather than swimming—a result of the reduced swim bladder that helps them maintain position in strong current. Much of its time is spent exploring the substrate, investigating caves, and foraging for food, creating constant activity at lower aquarium levels. Pairs form strong bonds and exhibit fascinating biparental care when breeding, with both parents guarding eggs and fry. The species demonstrates considerable intelligence and personality, learning to recognize keepers and associating humans with feeding.

Tank Mates

Compatible tankmates include robust, similarly sized West or Central African fish that can handle moderate aggression and appreciate similar water conditions. Some larger Synodontis catfish work well as bottom-dwellers occupying different niches. Other tankmates should only be considered in spacious aquariums with plenty of cover and territorial boundaries. Completely avoid small fish that can be bullied or eaten, very aggressive cichlids that may injure Buffaloheads, fin-nipping species, overly boisterous tankmates that cause constant stress, and tiny shrimp or small invertebrates that may be consumed. During breeding, even supposedly compatible tankmates may require removal as parental aggression escalates. Many keepers maintain pairs in species-only setups or with minimal compatible tankmates to showcase the species' unique behavior.

Breeding

Steatocranus casuarius is a cave spawner that forms strong pair bonds, with both parents participating in egg and fry care. Pairs typically select caves or sheltered crevices where females deposit 50-150 adhesive eggs on cave ceilings or walls. Parents usually guard eggs and fry closely, fanning eggs to maintain oxygen levels and removing fungused eggs. Provide stable water conditions, multiple hiding places, and a peaceful environment allowing parents to care for offspring without excessive stress. Eggs hatch within 2-3 days, with fry becoming free-swimming approximately one week later. Feed fry newly hatched brine shrimp, infusoria, and finely crushed flake foods with frequent small feedings. Parental care continues for several weeks as both parents shepherd fry around the territory, creating one of the most fascinating breeding behaviors available in commonly kept cichlids.

Why Buy from Tropical Fish Co

Tropical Fish Co specializes in freshwater fish uk, offering unique species like Steatocranus casuarius that bring behavioral diversity beyond commonly available cichlids. Our Buffaloheads arrive carefully acclimatized and health-guaranteed, backed by comprehensive support from staff who understand rheophilic species' specialized requirements. We provide expert guidance on creating appropriate river-biotope setups, maintaining excellent oxygenation and water quality, and selecting compatible tankmates for this semi-aggressive species. With decades of combined experience keeping specialized African cichlids, we appreciate both the challenges and rewards of maintaining unique species with distinctive requirements. Order your Steatocranus casuarius from the UK's trusted source for quality tropical fish for sale uk and experience one of the aquarium hobby's most characterful and behaviorally distinctive cichlids.