Cat-eLog Right Arrow Callichthyidae Right Arrow Corydoradinae Right Arrow Corydoras

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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.
SexingFemales grow larger and are more full-bodied, this is best observed from above the fish. Males will typically have more pointed as opposed to more rounded fin tips as they mature.
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)
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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
FeedingWill accept a wide range of commercial foods including tablets, granules and flakes. Live (or frozen) foods such as bloodworm, white worm, grindal worm, Daphnia and tubifex are readily accepted.
FurnitureShade provided by overhanging rock work, arching bogwood, tall or floating plants are all that is required. Ideally substrate should be sand, but rounded gravel is an imperfect alternative. Avoid keeping over rough edged (chipped) gravel, this will increase this risk of damage the fishes barbels when it tries to dig.
CompatibilityA peaceful, shoaling, community fish.
Suggested TankmatesAll Corydoras should be kept in groups of at least 6 of the same species. Otherwise compatible with most other types of fish that are reasonably peaceful, as long as they don't see a Corydoras as a snack.
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 (p: 2).

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Breeding Reports(1) bekateen (b: 59), (2) rmc (b: 54), (3) dkk (b: 40), (4) Narwhal72 (b: 40), (5) amazonaquatics (b: 13).
Article - CotM 2009 April
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Last Update2013 Feb 03 15:42 (species record created: 2002 Mar 07 00:00)