(Macro) Otocinclus flexilis

This large oto hails from SOUTH AMERICA: Middle and lower Paraná/Paraguay, Uruguay and La Plata basins and Atlantic coastal streams of southeastern Brazil.

Common / trade names: Peppered Otocinclus, Macrotocinclus flexilis, Otocinclus arnoldi, Otocinclus fimbriatus

The maximum size is 2″


These are a departure from other otos as they are omnivorous. Wild-caught otos may be challenged to switch over to commercial foods but may eventually accept frozen worms, algae wafers and blanced vegetables. These social creatures are best kept in groups and notably more protective over food though feigned aggressiveness towards other otos. Otherwise they make a great community species to consider

They also are diurnal and are more active during the day than other oto species which are more nocturnal.

Water parameters: Temperature of 68 to 77°F (20-25°C), pH 6.5 to 7.8; dH range: 2 to 25.

Resources: planetcatfish , badmanstropicalfish.com/

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The Aquatic Plant Society is dedicated to promoting the science and aesthetic of the Planted Aquarium. We are committed to a responsible and environmentally conscious pursuit of the hobby, and invite all to share in and add to our knowledge.