|Cat-eLog Data Sheet
|Hassar orestis (Steindachner, 1875)
|Black Top Mouse Catfish
|Rio Iça, upper Amazon River, Brazil.
|Hassar notospilus, Hemidoras notospilus, Oxydoras orestis
|ha sar - oh res tiss
|Hassar: From the Aruac name of the fish.
|206mm or 8.1" SL. Find near, nearer or same sized spp.
|The black top mouse catfish is very similar to another mouse catfish, Tenellus leporhinus, the main visual difference being the latter's clear dorsal fin with a black marking at its base. Aside from that T. leporhinus has longer leading fin rays.
|Similar to Corydoras in that females are larger and rounder than the more slender and smaller males. Male has a longer dorsal ray and the female has rounded pelvic fins.
|South America: Amazon, Orinoco and Essequibo River basins.
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, range map and more is available on the IUCN species page. Last assessed 2020.
|6.0 - 7.6
|22.0-25.0°C or 71.6-77°F (Show species within this range)
|Until acclimatized, the fish appears quite selective and like small foods. Crushed flake or sinking flake-based tablets best for smaller individuals although brineshrimp is taken by species around the 2'' mark. Larger, more settled fish are easier to feed and become very active during feeding. User data.
|Dense vegetation empowers this fish with a much needed sense of confidence in it's surroundings. Caves or dark refuges appear less important.
|Non aggressive and, as with all Doradids, sociable with its own species. Smaller fish appear to have an innate fear of larger fish and becomes very shy in their presence.
|Smaller shoaling tetras and Corydoras are ideal. Dwarf cichlids and smaller labyrinth fish (Gouramis etc) are also suitably gentile. Larger, acclimatized fish will do well in a medium to large community set-up. At any size, best kepts in shoals to ensure greater boldness and health.
|Unreported in the aquarium.
|There is no breeding report.
|Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 71 (no. 1), pp 138 , Pl. 1.
|There are 34 registered keepers, view all "my cats" data.
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There are 7 records of this fish being seen, view them all.
|More on Hassar orestis
|Look up Hassar orestis on AquaticRepublic.com
|Look up Hassar orestis on Fishbase
|Look up Hassar orestis on Encyclopedia of Life
|Look up Hassar orestis on Global Biodiversity Information Facility
|LFS label creator
|2020 Oct 24 06:10 (species record created: 2001 Apr 21 00:00)