he first month of 2012 heralds us a look at a member
of the Doradidae family "The Fog Doradid".
This is one of the nicest looking dorad cats around
and is conspicuous by its long snout and banded body
Provide a good
sized tank that will be 4ft (120cm) or above as they
can be a quick growing catfish. A soft substrate such
as sand will be better as sharp gravel can be detrimental
to the fishes barbels and its health. Prefers the
water to be on the soft side. Provide plenty of cover
for them in the shape of pipework and caves as they
are a very nocturnal catfish. You can also have hardy
plants in the tank.
Rhinodoras dorbignyi-head view
Above is the view
of the head showing the Humeral
process extending to the last one-fourth of the pectoral
fin. and the short maxillary barbels. It is prone
to leaning on to aquarium heaters so covering them
would be a good idea.
Where their was
only this species in the genera (monotypic) there
are now a further 4 species named; Rhinodoras
Pérez, 2008, Rhinodoras
boehlkei Glodek, Whitmire
& Orcés V., 1976, Rhinodoras
gallagheri Sabaj Pérez,
Taphorn & Castillo G., 2008 and Rhinodoras
thomersoni Taphorn & Lilyestrom, 1984.
Fishbase has this
species size as 50cm. TL and other publications at
17.5cm. SL so there is a discrepancy on the adult
size of this dorad.
Dorasdorbignyi, D. nebulosus, Oxydoras dorbignyi
River basin. Brazil, Paraguay.
Head as long as it is wide
or slightly longer. Fontanel is continued as an obscure
groove to the dorsal fin. Eyes moderate and located
in the middle of head. Preorbital plates are obscure.
Maxillary barbels not extending as far as the gill
openings. Humeral process extends to the last one-fourth
of the pectoral fin. The adipose fin is prolonged
forward as a keel. The dorsal fin is strongly serrate,
the serrae stronger on the posterior margin and directed
downward. The lateral scutes which number about 29-30
are low and the caudal peduncle is covered with modified
fulcra above and below. Caudal fin is forked.
Variable ranging from near
completely black or brown body bands according to
the substrate. Dark spots to the dorsal and caudal
Care & Compatibility
This species of Dorad is like
most of this family, very peaceful, but as adults
can prey on very small fish or fry on the substrate
at night so it is better to house with species that
cannot be eaten.
As they can be very nocturnal
they can be be best fed at lights out with tablet
foods and frozen foods such as bloodworms. If left
to their own devices they will actively seek out food
remains during the night.
Greek, rhinos = nose + Greek, dora = skin.
fin: Fleshy finlike projection without rays,
behind the rayed dorsal fin. Caudal fin: The tail. Caudal peduncle: The area between the
dorsal fin and the tail. Fontanel: The space(s) between the
bones on top of the skull covered by skin. Humeral process: Bony extension of
the pectoral girdle. Maxillary barbels: Pertaining to the
upper jaw (maxillary barbels). Pectoral fin:The paired fins after head and before anal fin. Preorbital: The first and usually the
largest of the suborbital bones; located along the ventro-anterior
rim of the eye. Sometimes called the lacrimal bone;
the bone or region before and below the eye. Scutes: Bony covering. Serrae:
Saw-like notches along an edge.
H.A. and R. Riehl 1985
Aquarien atlas. Band 2. Mergus, Verlag für Natur-
und Heimtierkunde GmbH, Melle, Germany. 1216 p. Burgess, W.E. 1989 An atlas of freshwater
and marine catfishes. A preliminary survey of the
Siluriformes. T.F.H. Publications, Inc., Neptune City,
New Jersey (USA). 784 p.