galeatus (Linnaeus, 1766)
n the 1970s and 80s T. galeatus (known then as Parauchenipterus
galeatus) was one of the few members of the woodcats that
you could purchase in the U.K. but today there has been a resurgence
in popularity for this family although they are still more popular
with catfish enthusiasts due to their crepsular habits.
Not one of the prettiest catfishes around
and can often be seen in different
colour tones due to the substrate/decor in the tank, and also
coming from different river systems they can have a brown colouration
(as above) to a darker version (below).
Aquarium setups should contain hiding
places such as pipework as they will jamb themselves in there
until dusk where they will venture out for food. If you keep
them in a dimly lit tank you will be able to see them more often.
Not a quickly growing catfish so they will take several years
to reach adult size. Substrate in the tank can be of choice,
either small round gravel or sand. The
larger the tank the better so they can grow to their potential,
anything over 3ft in length is recommended for a pair.
An easy catfish to keep with no special
demands on the keeper, although regular water changes are best
Dorsal spines (total): 1; Dorsal soft rays
(total): 5 - 6; Anal spines: 0; Anal soft rays: 20 - 25. The body
is stocky, the head a little depressed, the inferior jaw a little
prognathous, the cephalic helmet covered with finely pigmented
skin in adults, with a fontanelle shorter than the orbital diameter.
Body colour brown through to dark
brown with dark blotch on operculum and
just below dorsal fin. Brown mottled appearance throughout body.
Although they are not greatly aggresive
they can not to be trusted with small fish so would be better
housed with species larger than themself.
The spiny structure of the pectoral fins
enables the male to hold the females during mating (internal fertilization).
Sperm can be kept in the female's genital tract for several months,
owing to a gelatinous emission from the seminal vesicle of the
male. At maturity, the size of the adhesive eggs (20% of the female's
weight) is 3 mm. Nine days after hatching, alevin size is 1.5
cm and they feed on microscopic worms or small insects. At around
11 days, their negative phototropism pushes them to hide themselves
under branches or rocks.
Most prepared foods such as tablet and pellet
and frozen foods such as bloodworm. If the aquarium is dimly lit
you can see the it coming out to feed and will grab food out of
your hand if you dangle frozen bloodworm in the water.
The anal fin is the
key to the sexual dimorphism of this genus, if you think
of the male and female of most livebearer fish (Goodeidae
family) and you won't be too far away with this assumption.
The female has a normal anal fin but the males are modified
into a copulatory organ with the first and second ray
thickened and longer.
Greek, trachelos = neck + greek, pteron = wing, fin
The fin forward from the anal cavity.
Dorsal Fin: The
primary rayed fin(s) on top of the body
Operculum: The bony covering of the gills
T., M. Pascal, F.J. Meunier and P.-Y. Le Bail
1997 Poissons de Guyane. Guide écologique de l'Approuague
et de la réserve des Nouragues. Institut National
de la Recherche Agronomique, Paris, 219 p.
Froese, R. and D. Pauly. Editors. 2009.FishBase.
World Wide Web electronic publication. www.fishbase.org,
© Allan James @
Bottom Picture: © Enrico
Pseudauchenipterus galeatus, Trachycorystes galeatus, Parauchenipterus
galeatus, Auchenipterus maculosus, Parauchenipterus paseae
Guiana, Peru, Surinam, Trinidad & Tobago.
| 22cm. (8¾ins)
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