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  • Otocinclus affinis
  • Otocinclus affinis
Jump to next section 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. 
Jump to next section 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.
Jump to next section 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.
Jump to next section 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.
Jump to next section 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)