Vertebrae: 28 - 27. This species is distinguished
from its congeners by the presence of an elongated
dark spot along the middle caudal-fin branched rays,
not involving the lanceolate plates at the base of
the fin; the spot is typically extended over equal
number of upper- and lower-lobe branched rays and
along more than two thirds of the ray length. Habitat:
The species of Hypoptopoma typically occur
in streams of slow to moderate current and muddy to
sandy bottom with marginal emergent vegetation.
Sexual Differences: Male urogenital papilla
short and conical, covered by anterior flaplike anus.
Males with patch of tightly arranged small odontodes,
variably covering first to fourth plates of ventral
series, lateral to urogenital papilla. Males with
poorly developed soft-tissue flap along posterior
margin of pelvic spine. Female anus tubular, without
separate urogenital papilla. In females, size and
arrangement of odontodes on plates lateral to anus
similar to adjacent plates, without distinct patch
of differentially arranged odontodes. Female pelvic
spine without flap of soft tissue on posterior surface.
Aquarium Care: Will not bother other
fish in the aquarium. They like to hang on to thin
stalks of plants so they can see around it with their
laterally located eyes. Provide shaded hiding areas
in the tank with rocks or cave-like structures. Diet:
Feed an all round diet but prefers a vegetable diet
such as algae, spirulina tablets and cucumber/courgette.
Amazon River basin, Colombia and Peru. Type
locality: Peruvian Amazon
Evers, H.-G. &
Baensch Catfish Atlas Volume 1, 1st English edn.,
2005. Pp.944. Froese, R. and D. Pauly. Editors.
2022. FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 02/2022 ).