Catfish of the Month Right Arrow April 2000 • Article © Allan James, uploaded April 01, 2000



Slate Cory, Einfarbiger Panzerwels (Germany) - Corydoras concolor   Weitzman, 1961

Allan James, fellow webmaster of the excellent "Scotcat" site shares one of his personal favourites with us this month. Over to Allan...

This is certainly one of my favourite Corydoras and as you can see in the photograph above, a male, it is somewhat similar to the Bronze Cory (Corydoras aeneus), but there the similarity ends. Though C. concolor never attains the length of the bronze Cory, it is certainly a more robust looking fish. It appears to be more chunky, especially fully grown adults which can get very heavy and impressive looking. Colour-wise it is not startling compared to some other members of the genus (the species name, concolor, actually means, uniformly coloured; of the same colour) but well looked after specimens, especially in breeding condition, display fins of a rusty orange colour and against a grey to brown body it is certainly one of the more unusual and sought after species.

I first acquired four of this species from a friend in 1994, as he was having difficulty keeping the barbels on them, probably due to bacteria in the gravel. Bottom dwelling catfish, especially Corydoras, are the first to suffer from adverse conditions in the substrate.

I kept them on sand in my fish house Cory community tank up to the beginning of 1996. Slowly they began to grow back their barbels. I then set them up for spawning as I had, as it transpired, two pairs; the males are somewhat smaller and have an elongated dorsal fin with the females noticeably heavier looking.

As mentioned earlier, both sexes have a nice orange colouration to their fins with some species having more colour than others, probably depending on the wild catchment area. I find them quite an easy Cory to keep but somewhat shy in their surroundings.

I sometimes wonder why they are not more popular, but in the U.K. at least, they are not abundant in the aquatic shops. If you do find them, have a go at spawning them, you never know you might end up with a delightful tank of youngsters like mine below!

Corydoras concolor


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 concolor  Weitzman, 1961
Common NamesSlate Cory
Einfarbiger Panzerwels (Germany)
Type LocalityLas Mangas, in a trib. of Río Parguaza, Bolivar, Venezuela, 6°20'N, 67°10'W.
PronunciationKory DOOR ass - CONN cull or
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. Latin concolor = coloured uniformly.
Jump to next section Species Information
Size 60mm or 2.4" 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.

Easy to identify, this round nosed, high backed species is all over slate grey.
SexingMales have a longer dorsal, and they are somewhat smaller in proportion than the more robust females.
Jump to next section Habitat Information
DistributionWestern Venezuela
Orinoco (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)
pH6.4 - 7.0
Temperature23.0-26.0°C or 73.4-78.8°F (Show species within this range)
Jump to next section Husbandry Information
FeedingThe usual fare for adult Corys, a good quality flake food, tablet food, frozen bloodworm and whiteworm used sparingly. I fed the fry with infusoria to start off the first few days, then on to Brine shrimp nauplii, Microworm, fry and crushed flake.
FurniturePlanted tank with a few hideaways; that way they will feel secure in their environment, and you will see them out in the open more often.
CompatibilityPeaceful
Suggested TankmatesCertainly will enhance your community tank as long as it is at least 24'' long with 36'' being a better option. The usual community fish will suffice, but I am suspicious of a few of the Barb family as they do tend to nip the dorsals of Corydoras, so pick carefully.
BreedingUsing a 18'' x 12'' x 12'' tank with sand, Java moss, Java fern and a sponge filter. They spawned at a water temperature of 78F, a pH of 6 and GH 1. The eggs (shown above) are quite large, measuring 2mm and a creamy white colour. The first spawning yielded only 8 eggs but the second, 7 weeks later, amounted to 25 eggs. They laid eggs on and off for the next year then suddenly stopped for a year. The fry look like any other Cory fry having spots over the top half of the body and gradually begin to resemble the parents after 6 weeks, with pale orange fins, and a dark head which has quite a steep incline, making it look quite chunky.
Jump to next section Further Information
ReferencesProc. Biol. Soc. Wash.v. 74 - pp105 - Figs. 1-2
Registered Keepers(1) mummymonkey (k: 7), who also notes: "Like a large tank and plenty of hiding places. Easily spooked. Let the water age for 3 or 4 weeks to induce spawning. Spawned when water was left to age for 3 or 4 weeks. Eggs laid singly in Java moss and on the glass.", (2) Dave Rinaldo, (3) soltarii007 (k: 5), (4) Yan, (5) philtre, (6) AmLi (k: 5), (7) loafingloach (k: 2), who also notes: "these things are called slate cories. wtf? they should be called rainbow cories. :P A healthy specimen will have orangish hindquarters and a reflective green head, hard to capture in film OR photoshop.", (8) Selveste_Preben (k: 5), (9) Mazer, (10) anitabritt (k: 9), who also notes: "9 wc youngsters ", (11) Gry (k: 21), (12) Troender (k: 6), (13) Birger Amundsen, (14) gem400 (k: 3), (15) koter73, (16) boyneburn (k: 5), (17) NEONCORY (k: 6), (18) evesonevo (k: 6), (19) Kampfer, (20) sunfish (k: 6), (21) Azarak (k: 10), (22) jørn henning flåten, (23) coelacanth, (24) TheWetArm, (25) katgermain, (26) aurora (k: 3), (27) MatsP (k: 9), (28) corybreed, (29) ridout, (30) dave.h, (31) sheldon (k: 4), (32) aquaoahu, (33) keen-eyed (k: 4), (34) Rita Aspevik (k: 3), (35) Mark Roesner, (36) snowball, (37) saltcop, (38) jp11biod, (39) KansasGuppyGuy (k: 7), (40) matti2uude (k: 3), (41) donpetty (k: 7), (42) MHS, (43) mace, (44) Vess, (45) yogi88, (46) darr3ll, (47) Plecodoras, (48) Regina, (49) steveh28 (k: 6), (50) crazyjock (k: 6), (51) ladytara33, (52) Melander (k: 6), (53) rmc (k: 6), (54) neil187barton, (55) Joost (k: 17), (56) Lee Meadows, (57) TKL, (58) gossei (k: 5), (59) kruseman, (60) Valb68, (61) d3n2 (k: 2), (62) njfishguy (k: 12), who also notes: "Bought 3 young fish today just over 1". Will look for more to make a larger group. 5/21/14 - Bought 9 more from Wetspot. Fish just a little smaller than first 3. We'll see what happens after grow-out.", (63) Nabobmob1, (64) Cory Ben, (65) parrot1974 (k: 3), (66) christiansen (k: 5), who also notes: "180ppm ,23-24C, black water extract , very active and sociably !", (67) Csababá, (68) irshprncsk (k: 3), (69) scandicman (k: 10), (70) 4evercories, (71) Zulan, (72) cjerrom, (73) Tamcon83 (k: 7), (74) benma (k: 58), (75) Steven Jansen 72, (76) DHarris, (77) And3rs, (78) sleepyhead, (79) asparagus (k: 7), (80) francoisMtl (k: 20), (81) Bruno Magis, (82) Mvinyl (k: 2), (83) rizla75, (84) MarlonnekeW (k: 12), (85) anchorist, (86) Atmichaels (k: 7), (87) GeirO, (88) synolover, (89) los66 (p: 3), (90) Per Jensen, (91) matte s, (92) evojoey, (93) MChambers (k: 5), (94) Coolcorycats, (95) amazonaquatics, (96) Tetranerd, (97) protopterus, (98) KeXx (k: 24), (99) cawnov, (100) Koen, (101) cory-ap2 (k: 3), (102) bekateen (k: 8), (103) Mexnotex, (104) Sarod Yorc (k: 38).

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) Rita Aspevik (b: 56), (2) scandicman (b: 51), (3) Zulan (b: 47), (4) Sarod Yorc (b: 44), (5) Nabobmob1 (b: 43), (6) rmc (b: 41), (7) donpetty (b: 39), (8) Melander (b: 39), (9) Steven Jansen 72 (b: 13), (10) amazonaquatics (b: 13).
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Last Update2005 Jul 13 00:00 (species record created: 2000 Apr 01 11:22)

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