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Scientific NameHassar orestis    (Steindachner, 1875)
Common NamesBlack Top Mouse Catfish
Zwergdornwels (Germany)
Type LocalityRio Iça, upper Amazon River, Brazil.
Synonym(s)Hassar notospilus, Hassar ucayalensis, Hemidoras notospilus, Oxydoras orestis
Pronunciationha sar
EtymologyHassar: From the Aruac name of the fish. 
Hop to next section Species Information
Size206mm or 8.1" SL. Find near, nearer or same sized spp.
Hop to next section Habitat Information
DistributionSouth America
Guyana Waters, Coastal Rivers of Guyanas, Essequibo (click on these areas to find other species found there)
Amazon (click on these areas to find other species found there)
Orinoco (click on these areas to find other species found there)

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IUCN Red List Category
Least Concern
, a distribution map is available on the IUCN species page. Last assessed 2020.
pH6.0 - 7.6
Temperature22.0-25.0°C or 71.6-77°F (Show species within this range)
Hop to next section Husbandry Information
BreedingUnreported in the aquarium.
Breeding ReportsThere is no breeding report.
Hop to next section Further Information
ReferenceSitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 71 (no. 1), pp 138 [1], Pl. 1.
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There are 2 records of this fish being seen, view them all.
Hop to next section More Resources
Forum BBCode
Look up PlanetCatfish.comLook up H. orestis on PlanetCatfish.com
Look up on FishbaseLook up H. orestis on Fishbase
Look up on Encyclopedia of LifeLook up H. orestis on Encyclopedia of Life
Look up on Global Biodiversity Information FacilityLook up H. orestis on Global Biodiversity Information Facility
Hassar orestis QR codeLFS label creator
ARN ref:1.12.25.39
Last UpdateThu Jan 01, 1970 1:00 am (Species record created: Thu Jan 01, 1970 1:00 am)