month (June 2010) we welcome back regular
contributor, author and aquarist, Chris Ralph. His
subject this month is centered on an old favourite
from the Callichthyidaefamily, Corydoras
haraldschultzi. I now hand you over to Chris.
sometimes available amongst aquarium imports from
South America, and is well worth looking out for in
my opinion. It is suggested that aquarium specimens
might grow to 80mm s.l. for males and 85mm s.l. for
females. This is a very stunning species to look out
haraldschultzi belongs to the family Callichthyidae
or armoured catfishes from South America; namely Brazil:
State of Mato Grosso, upper Rio Guaporé. The
type locality for this catfish is documented as being
Rio Guaporé Brazil. This catfish is documented
as being found in Bolivia in addition to Central Brazil.
- head view
haraldschultzi prefer to be kept in water which
has a pH in the range of 6.0-7.2 and hardness in the
range of 2-25ºdGH. This catfish is ideally suited
to temperatures in the range of 22-27ºC or 71-8°F.
I would suggest
a minimum tank size of 24” x 15” X 12”
for a small shoal of these fascinating little catfish.
I would suggest good quality aquarium sand such as
BD Aquarium Sand, or very smooth rounded gravel as
the preferred substrate when keeping these catfish.
The aquarium should provide some shelter in the form
of rocks or bogwood along with some aquatic plants.
As with all other species of fish, water quality and
general husbandry is very important, and I would recommend
that a minimum of 25% water is changed on a weekly
to fortnightly basis.
This catfish is
quite often confused with Corydoras sterbai
which has a dark basic colour to its body with white
spots on its head and snout.
placed in Lineage 8 sub clade 4 which comprises
the "intermediate long-snouts" with deeper
bodies. It also includes Brochis in sub-clade
1 which was synonymised with Corydoras
by Britto in 2003 but in time there will be a revision
which will resurrect Brochis (Cope, 1871)
to full genera again.
and Bolivia. Type locality: Brasilien,
Male: 80mm: Female: 85mm SL.
(standard length – this is the measurement of
the fish from the tip of the snout to the base of
the caudal peduncle).
The body shape of Corydoras
haraldschultzi is described as being typical
triangular Corydoras shaped with a pointed
head and long snout. The body is slightly deeper in
comparison to other species of Corydoras.
The dorsal fin is described as having 7 to 8 soft
The base colour of the body
and head is described as being light overlaid with
6 to 7 bands of dark coloured markings leading from
the front of the dorsal down to the caudal peduncle.
There are dark grey reticulated markings on the
head which cover the snout and extend towards the
leading ray of the dorsal fin. The pectoral and
ventral fin spines are described as being orange
in colour, whilst the remaining fins are described
as being clear with black banding.
Care & Compatibility
Wherever possible I would
recommend that the aquarist keep these catfish in
a community aquarium in small groups of six or more,
but as the absolute minimum I would suggest three
specimens assuming that they are available in these
numbers. In their natural habitat Corydoras haraldschultzi
would be found in relatively large shoals.
There are no documented
records of Corydoras haraldschultzi having
been spawned in aquaria to date.
As with most other species
of catfish the males tend to be more slender than the
females. The females are described as being larger and
plumper as they get older. As with most other representatives
of the family Corydoradinae, the male is documented
as being much smaller than the female.
readily accepts a mixed and varied diet which
includes granular foods, frozen bloodworm and a good
skin,(helmeted Doras) cuirass. haraldschultzi: dedicated
to Mr Harald Schultz.
defined as a second dorsal fin which in the case of
Corydoras consists of fatty tissue with a single
spine supporting a thin membrane.
Anal fin is defined as the medial fin immediately
posterior to the anus.
Caudal fin is defined as the tail fin.
Caudal peduncle is defined as the usually narrowing
posterior part of the body between the anal and caudal
Dorsal is defined as being top or above. Dorsal fin is defined as the medial
fin on top of the back.
Dorsolateral is defined as extending from the
top to the side.
Operculum is defined as the large bone forming
the gill cover. Pectoral fins are defined as paired
Scute is defined as a bony plate. Syntopic is defined as being similar
in appearance. Ventral is defined as bottom, below
or underneath. Ventral fins are defined as the paired
fins between the pectoral and anal fins. Ventrolateral is defined as extending
from below and to the side.
Markos & Taylor, Martin (2011). Evolution,
ecology and taxonomy of the Corydoradinae revisited.
Fuller, I.A.M. & Evers, H-G: 2005 Identifying
Corydoradinae Catfish 384 p.