(Eigenmann & Eigenmann, 1888)
canthodorus spinosissimus belongs to the Doradidae family and
is very similar to Acanthodoras
cataphractus (Linnaeus, 1758).
The main differences are the lateral body plates of the caudal peduncle
in A. cataphractus tend to meet above and below (except
the last one), whereas in A. cataphractus the last four
or five pairs are separated. A. spinosissimus also has
a broader and spinier humeral process. and A. cataphractus
also tends to be a more slimmer fish.
their natural habitat these catfish are said to be abundant
in the calm waters of swamps and mangroves. They are most active
at night preferring to take refuge during the day. Not often
imported but can sometimes can be found as a bycatch alongside
This genera is the only of the family that has a rounded tail.
When these individuals are caught they will emit sounds by the
movement of their thorny pectorals and secrete a milky substance
from the axillary pore under the humeral process. This substance
is harmful for other fish and Schomburgk (1841) reports that is
bitter to the taste.
Head more wide that long. The
body is completely assembled with spines that are fairly deep, they
cover more than half of the body and are almost in contact in the
A thin yellow band all the long flank and
another more faint, from the eyes to the start of the dorsal fin.
All fins have markings without a specific pattern.
Wherever possible it is recommended that the
aquarist keep these catfish in small groups of four to six specimens,
assuming that they are available in these numbers; failing this
they are quite happy to shoal with other members of the
family Doradidae. In their natural habitat they would be found in
very large shoals.
These catfish are ideally
suited to being kept in a community aquarium environment
with other medium to large species of fish such as Bleeding
Heart Tetras, Emperor Tetras and other catfish. The main
thing to remember is that these catfish have quite a large
mouth and are capable of eating any fish small enough to
The close cousin Acanthodoras cataphractus
is documented as having been spawned in aquaria. Both parents were
observed digging a depression in the substrate into which the eggs
were deposited. The eggs were guarded by both fish. The eggs hatched
after 4-5 days although unfortunately the young did not survive
beyond the fry stage of development. This
should also be the case with Acanthodoras spinosissimus
Omnivorous and readily accepts a mixed and
varied diet which they search through the substrate. Catfish pellets,
good quality flake foods, granular foods, cultured whiteworm, earthworms,
aquatic snails which they relish and frozen foods such as bloodworm
to name but a few.
The males tend to be
more slender than the females which tend to have a plump
Bony extension of the pectoral girdle.
Dorsal: The primary rayed fin(s) on top
of the body.
Pectoral: The paired fins just behind the
The bony or cartilaginous skeletal arch supporting the pectoral
from the Greek acantha = thorns, and doras, meaning skin;
in reference to the spines on the bony scutes along the
the most spiny.
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.
seris de Guías Tropicales De Campo. Pecos del medio
Amazonas Región de Leticia. 546 p.
Ferraris, C.J. Jr., 2007. Checklist of catfishes,
recent and fossil (Osteichthyes: Siluriformes), and catalogue
of siluriform primary types. Zootaxa 1418:1-628.
Ferraris, C.J. Jr.,
2007. Checklist of catfishes, recent and fossil (Osteichthyes:
Siluriformes), and catalogue of siuriform primary types. Zootaxa
|Chocolate talking catfish
Amazon and Essequibo River basins. Type locality: Upper
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