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Jump to next section Cat-eLog Data Sheet
Scientific Name Ageneiosus magoi  Castillo & Brull G., 1989
Common Names Slopehead Catfish
Duck Catfish
Type Locality Los esteros de Camaguán at kilometer 270, Estado Guárico, Venezuela.
Pronunciation ah genie OH sus - mah go eye
Etymology Ageneiosus, from the Greek a, meaning without and genias, meaning beard in reference to the apparent lack of barbels. In fact, catfish of this genus have very short maxillary barbels that are almost indistinguishable to the human eye. The species is named in honor of Francisco Mago-Leccia (1931-2004), for his contributions to the study and knowledge of Venezuelan fishes, and his valuable work forming a new generation of ichthyologists.
Jump to next section Species Information
Size 240mm or 9.4" SL. Find near, nearer or same sized spp.
Identification Easily recognized by the black and white pattern, although the pattern itself can differ a lot.
Sexing Like all Auchenipterids, males have a genital papilla. Moreover, sexually active males get an enlarged and slightly curved dorsal spine and thickened barbels, that are used to clasp the female.

After the breeding season, the dorsal spine and the barbels grow back to their normal sizes.
General Remarks Wild caught specimen show some yellow on their body and fins, which disappears after some time in an aquarium. In contradiction to most other Auchenipterids, this species may be very active during the day.
Jump to next section Habitat Information
Distribution Orinoco basin.
Orinoco (click on these areas to find other species found there)

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pH 6.4 - 7.0
Temperature 23.0-30.0°C or 73.4-86°F (Show species within this range)
Jump to next section Husbandry Information
Feeding Voracious feeder that will eat anything that fits its mouth. Live fish, large frozen foods and pellets. When feeding live fish choose a proper source. It's best to breed them oneself. Feeding just goldfish is not recommended, as the quality of captive bred goldfish can be poor - which may cause diseases - and it's a very one sided diet.
Furniture Some pieces of driftwood as hiding spots. This species loves to swim against the current, so a large pump is obligatory. Provide lots of swimming space.
Compatibility Will ignore fish that it can't swallow.
Suggested Tankmates Larger catfishes like other Auchenipteridae, Doradidae and Loricariidae. Non-aggressive Characins like Metynnis.
Breeding Unreported.
Breeding Reports There is no breeding report.
Jump to next section Further Information
Reference Acta Biologica Venezuelica v. 12 (no. 3-4), pp 73, Figs. 1-3, 5-9.
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Last Update 2019 Sep 17 13:50 (species record created: 2005 Jun 29 00:00)