The Leopard Bush Fish is a nocturnal ambush predator from the Congo River basin with a labyrinth organ and striking leopard-like spotted pattern.
Overview
Ctenopoma acutirostre, commonly known as the Leopard Bush Fish, Spotted Climbing Perch, or Spotted Ctenopoma, is one of the most fascinating members of the family Anabantidae. This species originates from the Congo River basin in Central Africa, where it inhabits slow-moving rivers, backwaters, and lakes rich in vegetation and leaf litter.
The Leopard Bush Fish reaches 12-15 cm in length and can live 8-10 years with proper care. Its distinctive coloration — large dark spots on a lighter background — provides excellent camouflage among fallen leaves and driftwood. This fish is a master of leaf mimicry: it can hover motionless in the water column, gently swaying like a dead leaf in the current, patiently waiting for prey to drift within striking distance.
Like its close relatives — Pearl Gouramis and Dwarf Gouramis — Ctenopoma acutirostre possesses a labyrinth organ that allows it to breathe atmospheric air. This makes the species remarkably hardy and capable of surviving in waters with low oxygen levels. The Leopard Bush Fish is predominantly nocturnal: it hides among plants and shelters during the day, emerging to hunt at dusk.
Tank Requirements
The Leopard Bush Fish requires an aquarium of at least 200 liters. Optimal water parameters are: temperature 24-28°C, pH 6.0-7.5, and general hardness (GH) 5-20 dGH. The species tolerates parameter fluctuations reasonably well, but stable conditions are the key to long-term health and longevity.
The aquarium setup should closely replicate the natural habitat. Use plenty of driftwood, rocks, and caves to create hiding spots. Dense vegetation — both rooted and floating — is essential. Floating plants serve a dual purpose: they diffuse light and provide a sense of security. An excellent addition is leaf litter (oak, Indian almond, or beech leaves), which not only tints the water but also recreates the fish's familiar environment.
Lighting should be subdued — bright light causes stress in this nocturnal species. A tight-fitting lid is absolutely mandatory: Leopard Bush Fish can and will jump, especially when startled or when rising to the surface for air.
Feeding and Diet
Ctenopoma acutirostre is an ambush predator with a deceptively large mouth. Despite its relatively modest body size, this fish can swallow surprisingly large prey — anything that fits in its mouth will be eaten. In the wild, its diet consists of small fish, insects, larvae, and crustaceans.
In the aquarium, the diet should be based on high-quality frozen and live foods: bloodworms, brine shrimp, glass worms, small shrimp, and small feeder fish. Most individuals can eventually be trained to accept quality sinking pellets and flakes, although some stubbornly refuse dry foods.
A critical point: feed Leopard Bush Fish in the evening or after the main lights are off, when they are most active. This matches their nocturnal lifestyle and reduces competition with diurnal tank mates. Feed once daily and avoid overfeeding — these fish are prone to gluttony.
Care and Maintenance
The Leopard Bush Fish is a relatively undemanding species provided basic care requirements are met. Weekly water changes of 20-30% are necessary to maintain stable water quality. Effective filtration is essential, but water flow should be moderate — in nature, this species inhabits still or slow-moving waters.
Monitor key water parameters regularly (temperature, pH, hardness, ammonia, and nitrite levels). Pay attention to the condition of shelters and vegetation — the Leopard Bush Fish only feels confident in a well-decorated aquarium. A lack of hiding places leads to chronic stress and can negatively impact health.
Check the lid carefully: even small gaps can become escape routes. Also keep in mind that the fish periodically rises to the surface for a gulp of air — there should be an air space between the lid and the water surface.
Compatibility
Ctenopoma acutirostre has a moderate temperament, but its predatory nature must be considered when choosing tank mates. Any fish that fits in its mouth will eventually be eaten — and the Leopard Bush Fish's gape is considerably larger than it appears at first glance.
Suitable companions are medium to large fish with calm dispositions. Good options include larger Synodontis catfish, large tetras (Congo tetras and similar), and peaceful medium-sized cichlids. For an unusual pairing, consider the African Butterfly Fish — another African species with a nocturnal lifestyle.
Completely unsuitable tank mates include: small fish (neon tetras, guppies, rasboras), small shrimp, and fry of any species. Avoid housing with aggressive or overly active fish that would deprive the Leopard Bush Fish of peace.
When keeping a group of several individuals, the aquarium must be sufficiently spacious (350-400 liters or more), with abundant hiding places so each fish can establish its own territory.
Breeding
Breeding Ctenopoma acutirostre in the aquarium is a challenging but achievable task, rated 4 out of 5 in difficulty. The main challenge lies in finding a compatible pair and creating the right conditions for spawning.
To stimulate breeding, prepare a separate tank with soft, slightly acidic water (pH 6.0-6.5, temperature 26-28°C). Provide an abundance of floating plants — the female will scatter her eggs among them. Gradual temperature increases of 1-2 degrees and frequent soft water changes help simulate the onset of the rainy season, which serves as a natural breeding trigger.
During courtship, the male displays intensified coloration and performs a characteristic mating dance. Spawning usually occurs near the water surface, with the buoyant eggs floating up and settling among the floating plants. Adults must be removed immediately after spawning, as they will readily consume their own eggs.
The fry hatch in 2-3 days. First foods should be infusoria and newly hatched brine shrimp. Juveniles grow at uneven rates, and larger individuals may prey on smaller siblings, making timely size-sorting essential.