H. wajat is a benthopelagic (ecological region at the lowest level of water body) species. Type locality is an inundated area. Species occurs in slow flowing areas of water, associated with submerged vegetation.

Red List Category

Red List Criteria

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No population information known.

Unknown

A major threat to the Paraná basin is degradation in the quality of the basin's water resources, due to the disposal of untreated domestic and industrial effluents. The Paraná basin has the highest urban-industrial density in the inner country. The presence of herbicides and fungicides used in farming and cattle-rearing development may also become a considerable source of pollution. The construction of Itaipu, Rosana and Taquaracu hydroelectric power plants has attracted more people to the region to work (Diegues 1994). However, these threats are greater in the upper Paraná basin. The lower part of the basin has a very low human population and large parts of it are still in a rather pristine condition (Junk 2005).

Unlikely to be threatened to a large extent because the specific area occupied by the species has a relative low human presence.

There are no conservation measures in place and research into the population trends are required.