Species description

Care, breeding and tankmates

Fish profile

Temperament

Semi-aggressive

They possess a generally peaceful but somewhat boisterous and territorial temperament. While they ignore mid and top-water fish, they will fiercely defend their favorite caves from other bottom dwellers. They are hardy and confident, holding their own against semi-aggressive cichlids. Once comfortable, they become quite active and visible during the evening.

Diet

Omnivore

Synodontis eupterus is a completely unfussy omnivore that accepts a wide variety of foods. Their natural diet consists of insect larvae, small crustaceans, and plant matter. In the aquarium, they eagerly eat sinking pellets, algae wafers, frozen bloodworms, and brine shrimp. Providing some vegetable matter ensures proper digestion and long-term health.

Sex ratio

Solitary

There is no strict sex ratio required for this species, as they are not schooling fish. A single specimen is perfectly fine and often preferred to prevent territorial disputes. If keeping multiple individuals, a very large tank is needed so each can establish a territory. Visual sexing is very difficult, making specific ratios hard to maintain.

Feeding frequency

Twice daily

Being primarily nocturnal and crepuscular, it is best to feed them once or twice a day. The main feeding should occur just before or after the aquarium lights are turned off. This gives them a chance to forage naturally without competing with fast, diurnal fish. Avoid overfeeding, as they will constantly search the bottom for scraps.

Bioload

This relatively large catfish produces a moderate to high biological load in the aquarium. Due to their robust appetite and size, an efficient filtration system is absolutely essential. Regular partial water changes are also required to keep nitrate levels manageable. They contribute significantly to the overall bioload of a community tank.

Flow

Stagnant

Originating from rivers, they appreciate a moderate water flow that provides excellent oxygenation. While they don't require torrential currents, steady water movement mimics their natural habitat perfectly. Powerheads or spray bars can help achieve this gentle yet consistent flow. They also need calm resting spots behind driftwood or rocks.

Reproduction

Oviparous

Breeding this species in a home aquarium is extremely rare and poorly documented. In commercial aquaculture, they are bred using hormone injections to induce spawning. They are naturally egg-scatterers that breed during seasonal floods in the wild. Casual aquarists should not expect them to reproduce without specialized setups.

Compatibility & tankmates

They are generally peaceful with fish that are too large to be considered prey. However, they can be highly territorial and aggressive towards other bottom-dwelling species. Robust tankmates like medium to large African cichlids are ideal companions. Very small, delicate fish should be avoided as they may be eaten.

Tank level

Bottom

This species almost exclusively occupies the bottom levels of the aquarium. They constantly interact with the substrate, exploring caves and crevices. They are also famous for swimming upside down under pieces of driftwood or large leaves. Providing plenty of hiding spots near the substrate is crucial for their comfort.