Otocinclus bororo

Otocinclus bororo was described from specimens collected in the upper Río Paraguay basin in Mato Grosso state, central Brazil. It is a small, slender species with a pale midlateral stripe and subtle reticulated patterning on the dorsal surface — markings that become more apparent under good lighting. The name bororo honours the indigenous Bororo people of the Brazilian Cerrado region.

In its natural habitat, O. bororo occurs in clear, moderately flowing streams with sandy and gravelly substrates, aquatic vegetation, and submerged wood. The Paraguay drainage in this region is characterised by relatively soft water with moderate hardness — conditions that contrast with the ultra-soft blackwater habitats favoured by some other Otocinclus species. This gives O. bororo slightly broader water parameter tolerance.

In the aquarium, O. bororo is an attractive and active species that performs well in groups within planted community tanks. Its undemanding nature relative to some rarer Otocinclus, combined with its appealing coloration, makes it a worthwhile addition for collectors who want to move beyond the most common trade species. Care is standard for the genus: pristine water, group housing, and supplemental vegetable feeding.

Water: Soft to moderately hard at pH 6.0–7.5 and 20–26°C; consistent quality with low nitrates is important for long-term health. Tank: 40 litres minimum with plants, driftwood, and smooth stones; moderate current and good oxygenation appreciated. Feeding: Biofilm and periphyton supplemented with blanched vegetables and algae wafers. Breeding: Not well-documented; group housing in well-maintained soft water may yield occasional spawnings. Compatibility: Excellent community species; pairs well with small tetras, small corydoras, and peaceful dwarf cichlids.