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Down arrow Cat-eLog Data Sheet
Scientific Name Scleromystax macropterus  (Regan, 1913)
Common Names Hi Fin Peppered Cory
Bigfin Cory, Sailfin Cory
Type Locality Paranaguá, 25°32'S, 48°36'W, Paraná, Brazil.
Synonym(s) Corydoras bertoni, Corydoras macropterus
Pronunciation ss KLER oh muss tax - mah CROPP terr uss
Etymology Scleromystax: From the Greek sclero meaning hard and the Latin mystax meaning moustache. This specific epithet refers to its long (makros=long) feather-like fins (pteron=feather, fin).
Articles
Article Link - CotM Right Arrow 2009 Right Arrow March
Down arrow Species Information
Size 87mm or 3.4" SL. Find near, nearer or same sized spp.
Identification A reasonably easy species to ID when adult due to the finnage. Generally more elongate than similarly patterned species. Females may be confused with other species.
Sexing This species' males have (very obvious) longer pectoral and dorsal fins.
Down arrow Habitat Information
Distribution South America: Coastal rivers from São Paulo to Santa Catarina, Brazil and some upper Paraná River tributaries.
Santa Catarina State Rivers (click on these areas to find other species found there)
La Plata, Paraná, Upper Paraná (click on these areas to find other species found there)
Sao Paulo State Rivers (click on these areas to find other species found there)
Sao Paulo State Rivers, Itanhaém, Preto (São Paulo, Itanhaém) (click on these areas to find other species found there)

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IUCN Red List Category Endangered, range map and more is available on the IUCN species page. Last assessed 2018.
pH 5.4 - 7.0
Temperature 16.0-20.0°C or 60.8-68°F (Show species within this range)
Other Parameters Requires cooler water but can be kept reasonably warm if water is well aerated - this is not recommended for long periods of time. Tolerant of high pH if acclimated gradually.
Down arrow Husbandry Information
Feeding All prepared foods and live / frozen treats such as bloodworm.
Furniture Smooth pebbles and sand with bogwood and dried beech or oak leaves to leech tannins into the water. Plants can be used but are not necessary.
Compatibility Peaceful community tank inhabitant although it's water requirements (cool blackwater) tend to limit selection somewhat. If the aim is not reproduction then these fish will tolerate higher pH closer but still below neutral. Mature males will fight often inflicting significant damage, keep in a large area or overcrowd them to avoid this. Ratios of males to females does not seem to avert this behaviour. Overcrowded small tanks will require meticulous water management.
Breeding Unreported.
Breeding Reports There is but a single breeding report, read it here.
Down arrow Further Information
Reference Annals and Magazine of Natural History (Series 8) v. 11 (no. 62), pp 232.
Registered Keepers Keeping this species? Why not .
There are 15 registered keepers, view all "my cats" data.
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There are 9 records of this fish being seen, view them all.
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Last Update 2021 Sep 01 14:50 (species record created: 2001 Apr 30 00:00)