English catfish judge Chris Ralph introduces this month's featured catfish, a smaller than average Corydoras.
Corydoras cochui belongs to the family Callichthyidae from South America namely Brazil; Upper Araguaia River basin. This catfish is documented as occurring in the Rio Araguaia, Santa Maria Nova and State of Goyaz (Goiaz).
The body of this species is described as being slender with a rounded snout, although it does still have the typical triangular appearance which makes this family distinct. The base colour of the body and head is described as being light brown. There are four dark coloured blotches along the flanks of this catfish, one below the dorsal fin, one between the dorsal and adipose fin, one below the adipose fin and one on the caudal peduncle. There is a dark streak along the back of the fish which extends backwards from below the dorsal fin spine, ending in a dark spot on the upper edge of the caudal peduncle. The top of the head is described as being dark which continues to below the eye. The upper and anterior portion of the opercle is described as being dark in colour. The caudal fin is described as having five narrow irregular dark coloured cross bands. The base of the anal fin has a dark coloured spot extending into the body. The ventral fin is described as being clear. The pectoral fin rays have a few dark coloured scattered spots, whilst the dorsal fin rays have a scattering of dark coloured spots which form two irregular rows. The dorsal and pectoral fin spines are described as having a narrow dark line along them.
Corydoras cochui is best described as being one of the dwarf or pygmy species of Corydoras catfish. This particular species is not commonly available, but is well worth looking out for and is ideal for smaller aquariums. The catfish depicted in this feature have been incorrectly shown as Corydoras habrosus in the last couple of years.
I would suggest a minimum size of 24": x 15": X 12": for a small shoal of these catfish. As with all other species of fish, water quality and general husbandry is very important, and I would recommend that a minimum of 25% water is changed on a weekly basis.
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|Cat-eLog Data Sheet|
|Scientific Name||Corydoras cochui Myers & Weitzman, 1954|
|Common Name(s)||C022, Barredtail Corydoras, Cochu's Catfish|
|Type Locality||Rio Araguay, Santa Maria Nova, Goyaz, Brazil.|
|Pronunciation||Kory DOOR ass - COCK oo eye|
|Etymology||Cory = 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. This species is named in honour of Mr Fred Cochu.|
|Size||35mm (1.4") SL. Find near, nearer or same sized spp.|
|Identification||Corydoras 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.|
|Sexing||The males tend to be more slender than the females.|
|Distribution||South America: Upper Araguaia River basin.
Amazon, Lower Amazon, Tocantins, Lower Tocantins, Araguaia, Upper Araguaia (click on these areas to find other species found there) (Click the map-icon to show/hide map of species distribution)
|pH||6.0 - 7.2|
|Temperature||23.0-26.0°C or 73.4-78.8°F (Show others within this range)|
|Feeding||Readily accepts a mixed and varied diet which includes granular foods, frozen bloodworm and good quality flake to name but a few.|
|Furniture||Plenty of hiding places amongst bogwood and rocks. The ideal aquarium substrate to use with these catfish is aquarium sand.|
|Suggested Tankmates||Wherever possible I would recommend that the aquarist keep these catfish in a community aquarium in small groups of six or more, but as the absolute minimum I would suggest three specimens assuming that they are available in these numbers. In their natural habitat Corydoras cochui would be found in relatively large shoals.|
|Breeding||There are documented reports of aquarium spawnings of Corydoras cochui, adopting the typical ?T shape? breeding clinch. The spawning activity follows on from a period of conditioning with foods such as Daphnia and bloodworm, and a partial water change using cooler water.|
|References||Aquarium J.v. 25 (no. 4) - pp93 - Fig.|
|Registered Keepers||(1) loach, (2) thelivelylady, (3) briggadane (k: 12), (4) miravns (k: 2), (5) marangmic, (6) Coryman, (7) Lars Jamne (k: 28), (8) Rita Aspevik (k: 11), (9) Mark Panaque, (10) syno321 (p: 2).
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) Coryman (b: 1).|
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|Last Update||2007 Apr 29 04:08 (species record created: 2006 May 14 00:00)|