H. orestis is similar looking to Nemadoras leporhinus but this species has longer leading fin rays and sports a clear dorsal with black markings at the base. The genes Hassar also differs from its close relative Opsodoras in having an elongate eye (Opsodoras round eye) and long snout (snout shorter with a more rounded profile in Opsodoras
Hassar orestis = showing the long snout and the elongate eye
For a large species it is non aggressive and can be kept with smaller species such as small characins, dwarf cichlids, small labyrinth species and also other small catfish such as Corydoras and the smaller members of the Loracariids. Provide a soft substrate such as fine sand as they like to sift through this for edibles and a sharp substrate could cause damage to its fine feathered barbels.
Head narrow with long snout. Maxillary barbels reaching pectoral, with small barblets. Mental barbels papillose. Lateral plates small, the largest approximately 1.33 times the size of the eye. Large foramen present on occipital process.
This is a particularly delicate aquarium fish with low tolerence to adverse water conditions and disease. Lone individuals will not do well in an aquarium setup so a group of three or more will be more beneficial to the long term health of this species. A planted aquarium is a must as they like to hide in the roots more so than having a rock or wood setup.
Can be kept with smaller species such as small characins, dwarf cichlids, small labyrinth species and also other small catfish such as Corydoras and the smaller members of the Loracariids.
Males possess an elongated first dorsal ray. Females have more rounded pectoral fins than males.
Tablet foods, small live and frozen foods such as worms and Daphnia.