Bunocephalus knerii is a smaller species of aspredinid from the upper Madeira basin of Brazil and Bolivia. It closely resembles the more common B. coracoideus but is distinguishable by its slightly reduced size and minor differences in head shape and scute arrangement. In nature it inhabits sandy or silty river margins and seasonal pools, burying into the substrate to avoid detection.
In the aquarium, Bunocephalus knerii shares all of the lifestyle traits of its relative — it buries itself in fine sand, remains stationary during the day, and forages at night. It is marginally more compact, making it suitable for slightly smaller setups, though a sandy substrate of suitable depth remains essential. The species is equally peaceful and equally unlikely to be seen unless the owner actively searches at night with a red light.
This species is an excellent companion for small South American community fish that will not compete aggressively for food. It should be target-fed after dark with small pieces of bloodworm or sinking pellets placed near its buried location. Its modest size and self-sufficient, undemanding nature make it genuinely one of the easier oddball catfish in the hobby.
