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Anadoras grypus  (Cope, 1872)

he month of May 2013 takes us back to the South American family of the Doradidae and a quite pretty and sought after species; the "Dusky Doradid", Anadoras grypus.



Anadoras grypus



There are at this precise moment only 4 species in the Anadoras genera, namely our factsheet of the month A. grypus (Cope, 1872) from the Upper Amazon River basin in Peru, A. insculptus (Miranda Ribeiro, 1912) from Brazil and Argentina, A. regani (Steindachner, 1908) from the Amazon and Oyapock River basins and A. weddellii (Castelnau, 1855) from the Upper Mamoré, Paraguay and Pilcomayo River basins. Apart from A. weddellii and A. grypus the other two are uncommon in the hobby and are very rarely seen.


A. grypus and A. wendellii are similar but the later has plates formed in the caudal peduncle which A. grypus lacks.



Anadoras grypus = Close-up of Humeral Process


Anadoras grypus = Close-up of Caudal

Close-up of Humeral Process
Close-up of Caudal



Anadoras grypus is similar to Amblydoras nauticus but this species has a serrated dorsal fin ray against A. grypus which is smooth. There is also a difference in the colour patterns and the shape of the head fontanels. The bony plates are also smaller than on Amblydoras.


South America = Peru
Peru and Ecuador

The maps show the area where A. grypus is from, in small streams tributary to the Ambyiacu, as well as the river itself, which empties into the Amazon near Pebas, in Eastern Ecuador, some distance east of the Napo (Type Locality).


Aquarium Care: In the aquarium you should provide hiding places as with most Dorads they like to hide out during the day and establish their own space. Provide some plants with overhead planting an advantage as they do prefer dimmer lighting in the tank.



26 or 27 lateral scutes which are small. Has a modified caudal fulcra covering most of the peduncle above and below. Short adipose fin. The fontanel is D shaped.


Body light brown which is covered with large irregular shaped dark brown blotches. The head is mainly dark brown. Front half of the dorsal fin is covered with dark brown pigment, the remainder of the fin is clear with a few dark spots. Pectoral, ventral and anal fins with dark pigment in the centre and lighter at the edges. The adipose fin has a dark bar at the rear. Caudal fin has a broad dark horizontal bar in the centre of each lobe, the remainder of the fin is clear.


Generally peaceful with other placid species. As this species can grow moderately large you would need to house with same size species such as Cichlids and larger Characins as they could pick off smaller fish at night as this is, as most Dorads are, reclusive during daylight hours.

As yet unknown.

Sexual differences

Not yet described.



Tablet foods, frozen and live worms. Will also eat snails in the aquarium.


Anadoras: Ana = back; doras =  cuirass.


Baensch, H.A. and R. Riehl 1985 Aquarien atlas. Band 2. Mergus, Verlag für Natur- und Heimtierkunde GmbH, Melle, Germany. 1216 p.
Ferraris, C.J. Jr., 2007. Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa 1418:1-628.
Catfish Study Group UK.
2002. Information Sheet No. 28.
Google Maps - ©2013 Google

Glossary of Terms

Dorsal fin: The primary rayed fin(s) on top of the body.
Anal fin
: The fin forward from the anal cavity.
Caudal fin: The primary rayed fin(s) on top of the body.
Pectoral fin: The paired fins just behind the head.
Fulcra: Bony plates.
Fontanel: The space(s) between the bones on top of the skull covered by skin.

Photo Credits

© Danny Blundell @ The Danny Blundell PhotoGallery

Factsheet 203

Doras grypus
Common Name:
Dusky Doradid
Doradidae b
South America: Upper Amazon River basin: Peru. Type locality: small streams tributary to the Ambyiacu, as well as the river itself , which empties into the Amazon near Pebas, in Eastern Ecuador, some distance east of the Napo.
15cm. (6ins)
22-26°C (71-79°F)   
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