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

Jump to next section Cat-eLog Data Sheet
Scientific NameCorydoras similis  Hieronimus, 1991
Common NameSmudge Spot Cory
Type LocalityTrib. of Rio Madeira, vicinity of Ariqumes, Rondonia, Brazil.
PronunciationKory DOOR ass - sim ill iss
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 similis = like alluding to the similarity of the colouration of this species to Corydoras ourastigma.
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.

C. similis is the round nosed ''version'' of the long snouted C. ourastigma. The smudged marking at the base of the caudal fin separates it from other head-spotted species that have a distinct spot marking instead.
SexingFemale is fuller (when viewed from above) and larger.
Jump to next section Habitat Information
DistributionRio Jamari, tributary of the Rio Madeira, East Rondonia, Brazil
Amazon, Middle Amazon (Solimoes), Madeira (click on these areas to find other species found there)
Amazon, Middle Amazon (Solimoes), Madeira, Jamari (click on these areas to find other species found there)
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pH5.6 - 7.0
Temperature21.0-27.0°C or 69.8-80.6°F (Show species within this range)
Jump to next section Husbandry Information
FeedingFlake, tablets. Live food such as whiteworm, bloodworm, brineshrimp and tubifex (sparingly). Frozen bloodworm is more easily supplied and seems to bring on growth in sub-adults very satisfactorily.
FurnitureOther similar Corydoras, dwarf cichlids and tetras. A robust species that will adapt to larger peaceful tankmates.
CompatibilityA perfect citizen.
Suggested TankmatesIdeally keep with dwarf cichlids and tetras. A robust species that will adapt to larger peaceful tankmates. Keep in groups of at least six.
Breeding1. A ratio of 2:1 males to females has been successful at a pH of 7.2 and water at 76F which was reduced by approximately 5-6 degrees the day before spawning took place. It was back up to 76 when they began to spawn.
2. The spawning followed the typical ' T ' mating clinch, where the female nuzzles into the side of the male at a point just behind the pectoral fin. The male then clamps the female by her barbels (hence the need for good barbels, poor barbels means poor grip and possibly poor fertilization). Once the grip is complete both fish seemed to tremble for a few seconds, during this time the female deposited two 1.8mm eggs into a pouch made by clamping her ventral fins together. The female then broke away from the male and proceeded to find a suitable place to deposit her eggs. Altogether 28 moderately sticky eggs (out of a scale of 1 to 10 the these were 3) were laid all on the tank sides, all at various levels.
3. All the eggs were fertile and hatched in 4 days. 2 days after hatching the fry were free swimming and given pre-soaked powdered flake. This was followed by alternate small feedings of either brine shrimp or micro worm.
4. Fry Development is pictured above. The fry grew rapidly and at 7 days were 6.2 mm, at 14 days 9.0 mm, in 1 month 12 mm, after 2 months 16.4 mm, and after three months 21.0 mm. Adult colouration in 10 weeks.
5. After the spawning was complete the adult fish were removed, and the water treated with a few drops of methylene blue (1 drop per gal) to protect the eggs from fungal attack. Once the fry had hatched the water was changed at a rate of about 20% per day, for 5 days, removing the methylene blue concentration.
Jump to next section Further Information
ReferencesZ. Fischkundev. 1 (no. 1) - pp39 - Fig. 1
Registered Keepers(1) mikey, (2) Keithj, (3) racer36, (4) Coryologist (k: 13), (5) Yan, (6) Barracuda518 (k: 6), (7) Richie Hell (k: 2), (8) certan, (9) Daragh (k: 125), who also notes: "Includes about 100 week old fry.", (10) NEONCORY (k: 24), (11) amygoodness, (12) fulvioander (k: 2), (13) Carp37 (k: 6), who also notes: "sadly all died within 3 days of each other due to a disastrous experiment with a sand substrate- had been growing well up to that point", (14) AmLi (k: 16), (15) Mazer, (16) glenny, (17) gem400 (k: 10), (18) foffo (k: 8), (19) MatsP (k: 6), (20) alexmuchtar, (21) thelivelylady, (22) scat35, (23) Gry, (24) gismo5001, (25) Olivier, (26) NHL (k: 4), (27) Birger Amundsen, (28) sarae, (29) jar (k: 4), (30) reticulata, (31) behhl (k: 2), (32) worldwide73, (33) fjack88, (34) Boromark, (35) Kampfer, (36) ranmasan (k: 6), (37) FuglyDragon (k: 6), who also notes: "1 very successful spwn to date, approx 30 fry raised", (38) thejudgement (k: 3), (39) Gretesam, (40) tcmfish (k: 2), (41) Devin (k: 11), (42) jørn henning flåten, (43) donishi, (44) rodpam, (45) SHEAG35 (k: 32), (46) corydoras, (47) fishpimpin, (48) Rainyfly (p: 2), (49) Nabobmob1 (k: 6), who also notes: "Cf Similis", (50) Phreatobius (p: 2), (51) boyneburn, (52) jp11biod, (53) Dee (k: 6), (54) sheldon (k: 6), (55) jpod, (56) SHEAG (p: 2, k: 4), (57) coryla, (58) wgtaylor, (59) rhibear (k: 4), (60) Mark Roesner, (61) christiansen (k: 29), who also notes: "Two spawing intervals per year. Frozen Bloodoworms heavy diet increases the egg numbers. Very good hatch rate in mix 3:1 of RO and tap water . TDS ~230 ppm . Alkaline ph", (62) SergenTuncer, (63) reefdive, (64) KansasGuppyGuy (k: 10), (65) Rainbow, (66) donpetty (k: 5), who also notes: "Housed with a C. polystictus.", (67) Rita Aspevik (k: 5), (68) AquariumLover04 (k: 7), (69) MHS, (70) matti2uude (k: 6), (71) ars (k: 19), who also notes: "Spawning group", (72) BigToys (k: 2), (73) mace, (74) kim m, (75) tjudy, (76) CaliCory (k: 3), who also notes: "2 of the 3 seem to be well bonded with all 3 swimming together but the 2 separating off from the group from time to time. All fish are being fattened up in preparation of future spawning. Will be picking up 3 more in another week or so.", (77) leej24 (k: 5), (78) pleco_breeder (k: 6), (79) lasteeves (k: 6), (80) miku (k: 5), (81) anthonyking, (82) gossei (k: 13), (83) mgamer20o0, (84) Vess, (85) estherevans, (86) mpedersen (k: 20), who also notes: "Keeping one mixed group, and a second separate sibling group, in hopes of future breeding with mixed genetics for a vigorous line.", (87) darr3ll, (88) Jass, (89) Zzyzx85, (90) Thoth (k: 4), (91) crazyjock (k: 5), (92) duxallinarow, (93) rmc (k: 2), (94) Rummage, (95) Valb68 (k: 11), (96) Lee Meadows, (97) Supercorygirl, (98) mani29 (p: 3, k: 2), (99) cfa (k: 10), (100) fishdoc313 (p: 2, k: 9), (101) Ozboy (k: 10), (102) lilu (k: 2), who also notes: "More shy than other corys and don't socialize with others.", (103) TKL (k: 7), (104) Ingvald Arne Meland, (105) mark24, (106) camtang, (107) jodilynn (k: 2), who also notes: "Very lovely, distinct little cory, cohabitating with a Peppered Cory and a Trilineatus.", (108) irshprncsk (k: 3), (109) slayer5590, (110) cjerrom, (111) madattiver (k: 12), (112) Lewis m (k: 17), (113) Zulan, (114) irishman710, (115) benma (k: 11), (116) Gerald CapeTown, (117) SeanL (k: 6), (118) RolandNL (k: 22), (119) Xaim (k: 5), (120) Mvinyl (k: 6), (121) rizla75, (122) joshuasmith94, (123) aqua_maniacs, (124) Narwhal72, (125) DJay, (126) fishy1 (k: 2), who also notes: "2 Died", (127) fishfarmer (k: 35), (128) Guppy09, (129) los66 (p: 3), (130) 4evercories (k: 5), (131) Per Jensen, (132) matte s, (133) Junglejason, (134) fishiephil, (135) Coolcorycats, (136) scandicman, (137) Biulu, (138) Maxpedley, (139) Medievalmum (k: 2), (140) Tony4143 (k: 8), (141) dennis84, (142) Samaki, (143) Gormets.

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Breeding Reports(1) christiansen (b: 56), (2) Zulan (b: 51), (3) Nabobmob1 (b: 49), (4) Valb68 (b: 44), (5) rmc (b: 44), (6) Mvinyl (b: 43), (7) Vess (b: 42), (8) TKL (b: 29), (9) Narwhal72 (b: 29), (10) RolandNL (b: 13), (11) donpetty (b: 8).
Articles
Article - CotM 1998 November
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Last Update2005 Mar 12 00:00 (species record created: 2001 May 04 00:00)