Catfish of the Month Right Arrow April 2009 • Article © Chris Ralph, uploaded April 08, 2009

Corydoras diphyes   Axenrot & Kullander, 2003

Chris Ralph introduces this months species and shares with us some of his experience in keeping this species.

I first purchased a small shoal of these stunning little Cory’s in 2005. They were for sale at Porton Aquatic & Pet Centre in Wiltshire(UK) and I decided to purchase all 10 as they were unlabelled and very unusual. I kept them in a small aquarium in my kitchen along with some very nice Emperor Tetras. Unsure of their true identity I emailed a picture to my friend Ian Fuller who responded that they were indeed Corydoras diphyes.

Corydoras diphyes is a recently described species of Corydoras (2003). Corydoras diphyes is not yet commonly available to the hobbyist; in fact the ones that I purchased are the only ones I have seen for sale in an aquatic shop. When this catfish is available expect to pay around £5-£8 per fish. In its natural habitat Corydoras diphyes usually occurs in areas which have sandy substrates with bank vegetation entering the water. The water in which they are found varies from dark (stained with tannins) to clear or slightly turbid.

As you are most likely aware Corydoras diphyes belongs to the family Callichthyidae or Armoured Catfishes from South America. This catfish also belongs to the sub-family Callichthyinae. This is certainly a species that I intend to look out for in the future, as I am about to set-up some of my old aquariums that were originally within my now defunct fish house. I hope that you enjoy the following details about this little catfish. If anyone has managed to breed these fish perhaps you could add some more detail to the listing for this catfish.

Copyright information for the images used in this article can be found on the species' full Cat-eLog page.

Jump to next section Cat-eLog Data Sheet
Scientific NameCorydoras diphyes  Axenrot & Kullander, 2003
Common Name
Type LocalitySmall stream (arroyo) at Estancia María Belén, 8 kilometers from Colonel Patricio Colman, 25°40'13''S, 55°05'52''W, río Paraná drainage, Depto. Caaguazú, Paraguay.
PronunciationKory DOOR ass - die fees
EtymologyCory = helmet, doras = skin. In this case it was incorrectly used to mean armour (cuirasse) instead of skin in allusion to the dual rows of plates that run along the flanks of this genus. Diphyes, from the greek word meaning double nature; in reference to the unique (?) variation in colour patterns expressed in this species (striped and spotted).
Jump to next section Species Information
Size 50mm or 2" SL. Find near, nearer or same sized spp.
IdentificationCorydoras are identified by their twin rows of armour plates along the flanks and by having fewer than 10 dorsal fin rays. They are most commonly confused with the other genera in the sub-family, namely Brochis, Scleromystax and Aspidoras.
Jump to next section Habitat Information
DistributionBrazil: Restricted to tributaries of the Rio Monday and Rio Acaray, right bank tributaries of the Rio Parana
La Plata, Paraná, Acaray (click on these areas to find other species found there)
La Plata, Paraná, Monday (click on these areas to find other species found there)
Show it on a map (Click the map-icon to show/hide map of species distribution)
pH6.0 - 7.0
Temperature18.0-22.0°C or 64.4-71.6°F (Show species within this range)
Jump to next section Husbandry Information
BreedingHas been bred. Breeds after 50% water change with water around 14°C.
Jump to next section Further Information
ReferencesIchthyological Exploration of Freshwaters v. 14 (no. 3)
Registered Keepers(1) kim m (p: 2, k: 10), who also notes: "Very productive F1 group.", (2) fulvioander (k: 6), (3) Birger Amundsen, (4) kenneth knutsen, (5) mummymonkey (k: 6), who also notes: "Both fry and adults like to hide in floating plants. Fry will turn upside down to eat newly hatched brine shrimp from the water surface. Very productive species - spawns almost weekly.", (6) Erod93, (7) Shaun (k: 5), (8) Mark Roesner, (9) MHS, (10) dkk (k: 31), who also notes: "Not too warm water. Young fish (larvae) might die when the temperature rises above 24°C. Easy to breed. Cold water changes and rich food after a period of warmer water & staple food will make them spawn for sure. They larvae are very inactive the first couple of days and are easy prey. I left my group alone in a peaceful community tank and they doubled their group size within two years (12 --> 25).", (11) Eric Bodrock (k: 4), (12) siluriphil, (13) rmc (k: 17), who also notes: "WC fish imported from Paraguay. Struggled at first (red gills, lethargic) but seemed to do much better with a temperature around 75-77 deg. F.", (14) Narwhal72, (15) bekateen (k: 2), who also notes: "Breed like rabbits. I had 3 egg-layings in the first 5 days of ownership (still in quarantine), of ~70, 35, 30 eggs each time!", (16) 4evercories (k: 5), (17) evojoey, (18) amazonaquatics, (19) Gulper.

Click on a username above to see all that persons registered catfish species. You can also view all "my cats" data for this species.
Breeding Reports(1) bekateen (b: 59), (2) rmc (b: 54), (3) dkk (b: 40), (4) Narwhal72 (b: 40), (5) amazonaquatics (b: 13).
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Last Update2013 Feb 03 15:42 (species record created: 2009 Apr 08 09:04)

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