Distinguished from T. quadrifilis in the
alignment of the lateral margins of the head in the
region from the anterior margin of the orbit to the
posterior limit of the opercle (running approximately
in parallel from ventral view vs. diverging laterally,
respectively); in the body width at the pectoral-fin
insertion as a proportion of the head width at the
posterior margin of the orbit (0.99-1.10 vs. 1.17-1.25,
respectively); in the distance from the tip of the
snout to the anal fin origin (0.29-0.32 of SL vs.
0.33-0.36 of SL, respectively); and in the position
of the anterior termination of the gill opening (one
orbital diameter posterior of the transverse plane
running through the posterior margin of the orbit
vs. positioned in the transverse plane running through
the center of the orbit, respectively). Sexual
Differences: The males develop an extended
dorsal fin and is thorny. Aquarium Care:
A tank for Tetranematichthys should contain
fine sand on the bottom, should be softly lit and
should be equipped with a great number of driftwood.
During daytime the fish often sleep lying on the side.
This behaviour is absolutely normal and no reason
for the aquarist to become anxious. It is carnivorous
and prefers to feed on small fish. Against conspecifics
Tetranematichthys are peaceful. Diet:
Prefers live foods given at lights out. Try
different choices of frozen foods to see what they
prefer as they can be picky in their dietary requirements.
Wallace's Driftwood Dolphin
South America:Amazon basin: upper Negro River system in
Brazil and Venezuela and upper Orinoco River basin
in southern Venezuela.
Vari, R.P. and C. Ferraris,
Jr. 2006 The
catfish genus Tetranematichthys (Aucheniptridae).