Golden Oto (Macrotocinclus affinis, formerly Otocinclus affinis)

It is one of the smallest known suckermouth catfish, often called a 'dwarf oto'. Typically found in Southeast Brazil, this herbivorous, rheophilic, bottom-feeder only grows to around 1.5 inches in length. This small pet fish is often used for the purpose of controlling algae in small home aquariums.

The pet fish prefers an aquarium with fast moving water, sandy substrate, and plenty of hiding areas. Preferred pH is slightly acidic with a tank temperature of 70-80°F. This algae eater fish is not as hardy as many of the other Otocinclus species.

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