Belonoglanis tenuis is a species of loach catfish found in the Congo Basin where it occurs in the Congo River basin.

The Belonoglanis tenuis usually measures at around 17 centimeters.

There is a single row of bony plates from the dorsal fin to the caudal peduncle on the top of the fishes body.

The Belonoglanis tenuis is long and thin.

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