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  • Pseudauchenipterus nodosus
Jump to next section Cat-eLog Data Sheet
Scientific NamePseudauchenipterus nodosus  (Bloch, 1794)
Common NamesCocosoda Catfish
Fadendornwels (Germany)
Type LocalityTranquebar [actually South America].
Synonym(s)Auchenipterus furcatus, Pseudauchenipterus guppyi, Pseudauchenipterus nigrolineatus, Silurus nodosus, Silvaichthys aguilerae
Pronunciationsued aw ken nip ter uss - no doh suss
EtymologyFrom the Greek pseudes meaning false, auchenos, meaning neck and pteron, meaning fin; in essence, a false Auchenipterus. Latin nodosus, from nodus meaning having numerous or conspicuous protuberances presumably in reference to the fishes conspicuous barbels.
Jump to next section Species Information
Size 220mm or 8.7" SL. Find near, nearer or same sized spp.
IdentificationA slender species with rather long barbels for an Auchenipterid. The forked caudal fin is jet black. The snout is very rounded with a terminal mouth.P. nodosus has a complete lateral line with zig-zags. Mees (Zoologische Verhandelingen No. 132, 1974) states the colour of the tail fades or even disappears as the fish grows larger although this has been contradicted by at least some individuals grown up to to 18cm that had their caudal fin remain black.
SexingAdult males have a genital papilla, are much more slender than females and have a slightly protruding lower jaw. Females grow larger.
General RemarksA fish that is rarely imported, which is a shame as it is rather active during the day and displays an interesting colour pattern.
Jump to next section Habitat Information
DistributionSouth America. Lower reaches of rivers and into estuaries from Venezuela to Brazil.
Orinoco, Lower Orinoco (click on these areas to find other species found there)
Guyana Waters, Coastal Rivers of Guyanas (click on these areas to find other species found there)
Amazon, Lower Amazon (click on these areas to find other species found there)
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pH6.6 - 8.0
Temperature20.0-26.0°C or 68-78.8°F (Show species within this range)
Other ParametersThis species is adapted to life in brackish water (presumably even salt water) but does very well in fresh water too. A strong current is recommended.
Jump to next section Husbandry Information
FeedingAll prepared and frozen foods are greedily taken. Juveniles take their food from the bottom, whereas adolescents and adults obtain theirs mainly from the surface.
FurnitureSome hiding places and lots of swimming space.
CompatibilityThis species will not harass other fishes, but it is a strong competitor for food. One must see to it that other fishes get sufficient food when accompanied by auchenipterids.
Suggested TankmatesThis species dislikes being kept with aggressive fishes. Avoid fishes that are too small and risk being eaten by 'accident'.
BreedingUnreported, but for certain by means of internal fertilization. During reproduction the ventral fins and mandible turn pink.
Jump to next section Further Information
ReferencesNaturg. Ausl. Fische v. 8 35 Pl. 368 (fig. 1),
Registered KeepersNone.
Breeding ReportsNone.
Article - CotM 2008 August
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Last Update2008 Jul 31 11:50 (species record created: 2006 Apr 29 00:00)