Abramites hypselonotus, known as the Marbled Headstander or the High-Backed Headstander, is a member of the family Anostomidae of the order Characiformes. Under normal fish classifying rules, you would gather from its upturned mouth and long streamlined body, that the Marbled Headstander is a surface dweller. In reality, Marbled Headstands, like all Headstands, inhabit the middle and lower portions of the aquarium. In the wild, head standers are often found face down, tail up in narrow vertical rocky fissures.
Marble Headstanders are generally identified by their High-Backed Headstander, pointed snout, diamond-shaped body, brown markings on the pelvic fin, wavy dark brown bands, and a dark line at the base of the caudal peduncle. The Marble Headstanders full adult size is roughly 13 cm, on both sides, they are among the rarely introduced representatives of the Anostomidae and the males are more contrasted than the females.
The Marble Headstander is a predominately herbivorous fish and as such should be given a high vegetation diet. In addition to processed food, they will readily accept, and probably enjoy lettuce leaves and peas. They will also accept Mosquito Larvae and Bloodworms.
In the aquarium, the Marble Headstander is generally a peaceful inhabitant. They are completely docile as juveniles both towards other fish and members of their own species. Once older keep either a single Headstander or a group of seven or more in a tank as they tend to fight amongst themselves in smaller groups. They are still generally peaceful towards other fish.
Due to the high demand for plant food, robust plants have a small chance of survival due to the sprouting of shoots. Socialization should be done with other great tetras that have similar claims. Keep Marble Headstanders a rocky, inheavily planted aquarium for them to explore, too small aquariums lead to increased quarrels between conspecifics, which can be avoided by sufficiently offered hiding places with roots and stone structures, consisting of cracks and crevices. If there is not enough vegetation in its diet, it will devour aquarium plants. On the other hand, you can use this to your advantage if you want to set up a «self-sustaining aquarium», please keep in mind that this is not an easy task, do not just throw a bunch of plants in and think it will be fine.