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Down arrow Cat-eLog Data Sheet
Scientific Name Otocinclus affinis  Steindachner, 1877
Common Names Golden Oto
Almindelig Dværgsugemalle (Denmark), Ohrgitter-Harnischwels (Germany)
Type Locality Streams at Santa Cruz in region of Rio de Janeiro, Brazil.
Synonym(s) Macrotocinclus affinis
Pronunciation auto SINK luss
Etymology Greek, ous, oto = ear + Latin, cinclus = latticework; in allusion to the holes of the head in the ears. 
Down arrow Species Information
Size 50mm or 2" SL. Find near, nearer or same sized spp.
Identification Otocinclus affinis is a rare import from Brazil. It is almost universally misidentified in hobby literature with the correct determination often being O. vittatus which is very commonly imported and offered for sale. .
Sexing Females are larger and broader especially when viewed from above.
General Remarks Mainly nocturnal.
Down arrow Habitat Information
Distribution South America: vicinity of Rio de Janeiro, Brazil.
Rio de Janeiro State Rivers (click on these areas to find other species found there)

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pH 6.0 - 8.0
Temperature 20.0-26.0°C or 68-78.8°F (Show species within this range)
Other Parameters dH 5-19.
Down arrow Husbandry Information
Feeding Feeds on algae, in particularly on leafs and roots of plants.
Suggested Tankmates Keep in groups (preferably at least six) with any small to mid-sized community fish.
Breeding Unreported.
Breeding Reports There is no breeding report.
Down arrow Further Information
Reference Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 76 (1. Abth.), pp 221 [5], Pl. 1 (figs. 1-1b).
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Last Update 2019 Sep 28 02:52 (species record created: 2003 Aug 16 00:00)