Otocinclus vestitus

Otocinclus vestitus is a Peruvian species regularly collected and exported from the upper Amazon basin. It is a sturdily built Otocinclus with a clean, well-defined lateral stripe and a slightly broader body profile than the slender O. affinis. In the trade it is sometimes mixed with other Otocinclus species, but careful observation of the caudal spot and stripe details allows identification.

Naturally found in clear to slightly turbid Peruvian rivers and streams, O. vestitus occupies shallow, well-lit habitats with abundant riparian vegetation and submerged wood. It schools in groups and grazes continuously on periphyton, diatoms, and soft green algae from every available surface. The species appears to tolerate a modest range of water conditions in the wild, reflecting its adaptability in the aquarium.

In the planted aquarium, O. vestitus performs reliably as an algae eater and is one of the species most likely to accept supplemental prepared foods. It is best maintained in groups of six or more in tanks with established plant growth and ample grazing surfaces. As with all wild-caught Otocinclus, careful acclimatisation and prompt supplemental feeding are the keys to long-term success.

Water: pH 6.0–7.5, temperature 20–26°C, soft to moderately hard; pristine conditions essential during acclimatisation. Tank: 40 litres or more with live plants, driftwood, and smooth stones; moderate lighting supports biofilm growth. Feeding: Blanched courgette, cucumber, and algae wafers supplement biofilm; acclimate to prepared foods using wafers placed directly on grazing surfaces. Breeding: Infrequently bred in captivity; soft, slightly acidic water and nutritional conditioning increase chances. Compatibility: Peaceful with all small community fish, invertebrates, and snails; one of the more community-friendly otocinclus.