🐟 AquaticCare difficulty: IntermediateLegal complexity: Low
Featherfin Synodontis
Synodontis eupterus · also called Featherfin Squeaker, Featherfin Catfish, Synodontis Catfish, Squeaker Catfish
A hardy, long-lived African upside-down catfish family member named for the ornate, feathered dorsal fin of young fish. A peaceful but boisterous bottom-dweller that grows large, lives for decades, and produces audible squeaking sounds when handled.
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Quick facts
| Size | Robust African catfish reaching about 20-30 cm (8-12 in); juveniles show a dramatic feathery, sail-like dorsal fin. |
| Lifespan | 10–25 years |
| Social needs | solo |
| Native region | Africa (White Nile and Chad basins, Sudan and West-Central Africa) |
| Origin | Old World |
| Climate | 🌴 Tropical |
| Water type | 💧 Freshwater |
| Family | Mochokidae |
| Genus | Synodontis |
Part of the Catfish
Catfish are a diverse order of mostly bottom-dwelling fish, including peaceful shoaling corydoras, armored loricariids, and scavengers prized for keeping the lower levels of an aquarium active and clean.
Habitat & space requirements
From the minimum an animal needs to be kept humanely, up to the ideal setup. Bigger is almost always better — minimums are floors, not targets.
Life & growth stages
How this animal changes through its life — each stage often has its own care, diet and space needs.
Habitat & enclosure
A single adult needs a tank of at least 280-340 litres (75-90 US gal); they grow large, are robust swimmers, and become territorial in cramped quarters. Provide plenty of caves, driftwood, rockwork, and shaded hiding places, with a soft substrate and dim or planted cover suited to their nocturnal, retiring habits.
They are tropical: keep water at 22-27 C (72-81 F), pH 6.5-7.5, soft to moderately hard, with strong filtration and brisk flow to mimic their river habitat. They are messy, high-bioload fish, so generous filtration and regular water changes are essential to keep nitrates in check.
Substrate
Use fine sand or smooth gravel to protect their barbels and underside as they forage along the bottom. Pair with driftwood, slate caves, and smooth rockwork to provide the shaded retreats they need.
Equipment & setup
Provide powerful filtration (canister recommended) to handle their heavy waste output, plus a heater for stable tropical temperatures. Good flow and oxygenation suit their riverine origin, and a secure, weighted lid prevents escapes by this strong, restless fish.
Diet
Unfussy omnivores that scavenge the bottom: offer sinking pellets, catfish wafers, frozen and live bloodworms, brine shrimp, and the occasional snail or bit of vegetable. They forage by scent at night and will eat almost anything that reaches the substrate.
Feed a varied diet with both meaty and plant components, and avoid relying on leftovers alone, as a fish this size needs deliberate feeding. They readily eat snails, making them useful for snail control, but should not be left to scavenge a sparse tank.
Behavior & temperament
Generally peaceful toward fish too large to eat but can be territorial and pushy with their own kind and other bottom-dwellers, especially in tight space. They mix well with larger, robust community fish and African cichlids, and ignore mid-water species. Small fish may be eaten at night.
They are nocturnal, secretive by day, and active foragers after dark, sometimes swimming inverted near surfaces in the family tradition. The species name 'squeaker' refers to the stridulation sounds they make with their pectoral spines when stressed or handled.
Health
As a largely scaleless catfish they are sensitive to ich and to copper- and salt-based medications, which should be dosed conservatively. Bloat and constipation can occur from a monotonous or overly rich diet, so vary the menu and include fibre.
Their sharp, locking pectoral and dorsal spines tangle in nets and can injure handlers and other fish, so move them in a container. Keep water clean and well oxygenated to prevent fin and barbel erosion, and quarantine newcomers to avoid introducing parasites.
Tips, DIY & hacks
Avoid netting them; their spines lock and snag, so use a container to transfer. Buy them for the long haul, as they can outlive many other aquarium fish by decades, and provide a cave each fish can claim as its own daytime retreat.