The manduva or mandube (Ageneiosus brevifilis) is a species of catfish (order Siluriformes) of the family Auchenipteridae.
It is colored white and dark blotches on back of head and body, black fin marginal flow. His body is long and compressed. depressed head, dorsal profile almost straight to the occiput, and rises sharply to the spine; bony chin reaches the anterior edge of the eye. His spine is strong and thick, like the head. The pectoral spine is thin and smooth edges. It has an anal fin, which originates near the flow; is long, their long radii form a caudal lobe, forked, and the upper lobe more developed, reaching up to 35 cm.
Reaches 500 grams. It feeds on small fish and crustaceans according to thembaprograms.com.
The female has the weaker and shorter than the head spine. Its anal fin has no anterior lobe; and the dorsal profile does not rise so sharply. The fleshy chins are small and bony bases, not exceeding the maxilla.
Living in areas with soft vegetables and streams in the basins of the Middle and Lower Parana; Uruguay Middle and Lower; River Plate. Spawns in the river Uruguay in November and December. It is fished in the Uruguay and Parana rivers August to April.