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Down Cat-eLog Data Sheet
Scientific Name Pseudauchenipterus nodosus  (Bloch, 1794)
Common Names Cocosoda Catfish
Fadendornwels (Germany)
Type Locality Tranquebar [Tharangambadi], India [actual is South America].
Synonym(s) Auchenipterus furcatus, Pseudauchenipterus guppyi, Pseudauchenipterus nigrolineatus, Silurus nodosus, Silvaichthys aguilerae
Pronunciation sued aw ken nip ter uss - no doh suss
Etymology From 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.
Article Link - CotM Right 2008 Right August
Down Species Information
Size 220mm or 8.7" SL. Find near, nearer or same sized spp.
Identification A 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.
Sexing Adult males have a genital papilla, are much more slender than females and have a slightly protruding lower jaw. Females grow larger.
General Remarks A fish that is rarely imported, which is a shame as it is rather active during the day and displays an interesting colour pattern.
Down Habitat Information
Distribution South America: Lower reaches of rivers and into estuaries from Venezuela to Brazil, at least to Bahia, including southern Trinidad.
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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IUCN Red List Category Least Concern, range map and more is available on the IUCN species page. Last assessed 2020.
pH 6.6 - 8.0
Temperature 20.0-26.0°C or 68-78.8°F (Show species within this range)
Other Parameters This 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.
Down Husbandry Information
Feeding All prepared and frozen foods are greedily taken. Juveniles take their food from the bottom, whereas adolescents and adults obtain theirs mainly from the surface. User data.
Furniture Some hiding places and lots of swimming space.
Compatibility This 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 Tankmates This species dislikes being kept with aggressive fishes. Avoid fishes that are too small and risk being eaten by 'accident'.
Breeding Unreported, but for certain by means of internal fertilization. During reproduction the ventral fins and mandible turn pink.
Breeding Reports There is no breeding report.
Down Further Information
Reference Naturgeschichte der ausländischen Fische v. 8, pp 35, Pl. 368 (fig. 1).
Registered Keepers There are 2 registered keepers, view all "my cats" data.
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There are 4 records of this fish being seen, view them all.
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Last Update 2020 Sep 29 02:58 (species record created: 2006 Apr 29 00:00)