Corydoras similis • Callichthyidae • Cat-eLog • PlanetCatfish

Line drawing of 10-12 week old sub-adult
Line drawing of 7 day old fry
Line drawing of 4-6 week old juvenile
Male (below) with female laying eggs (in fins)
Taken at collection site - Rio Maçangana, French Guiana
Albino
Male
Pair - female on left

Cat-eLog Data Sheet
Scientific Name	**Corydoras similis** Hieronimus, 1991
Common Name(s)	Smudge Spot Cory
Type Locality	Trib. of Rio Madeira, vicinity of Ariqumes, Rondonia, Brazil.
Pronunciation	Kory DOOR ass - sim ill iss
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. Latin similis = like alluding to the similarity of the colouration of this species to Corydoras ourastigma.
Species Information
Size	60mm (2.4") 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. 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.
Sexing	Female is fuller (when viewed from above) and larger.
Habitat Information
Distribution	Rio Jamari, tributary of the Rio Madeira, East Rondonia, Brazil Amazon, Middle Amazon (Solimoes) , Madeira (hover or click on these areas to show maps or find other species found there)
pH	5.6 - 7.0
Temperature	21.0-27.0°C or 69.8-80.6°F (Show others within this range)
Husbandry Information
Feeding	Flake, 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.
Furniture	Other similar Corydoras, dwarf cichlids and tetras. A robust species that will adapt to larger peaceful tankmates.
Compatibility	A perfect citizen.
Suggested Tankmates	Ideally keep with dwarf cichlids and tetras. A robust species that will adapt to larger peaceful tankmates. Keep in groups of at least six.
Breeding	1. 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.
Further Information
References	Z. 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) Redcatman, who also notes: "Had more, but a couple have died over the years.", (10) Daragh (k: 125), who also notes: "Includes about 100 week old fry.", (11) NEONCORY (k: 24), (12) amygoodness, (13) fulvioander (k: 2), (14) 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", (15) AmLi (k: 16), (16) Mazer, (17) glenny, (18) gem400 (k: 10), (19) foffo (k: 8), (20) MatsP (k: 6), (21) alexmuchtar, (22) thelivelylady, (23) scat35, (24) Gry, (25) gismo5001, (26) Olivier, (27) NHL (k: 4), (28) Birger Amundsen, (29) sarae, (30) jar (k: 4), (31) reticulata, (32) behhl (k: 2), (33) worldwide73, (34) fjack88, (35) Boromark, (36) Kampfer, (37) ranmasan (k: 4), who also notes: "Purchased @ 3/4", these little guys have been my slowest growers even with varied diet and good H2O parameters. Had 8, down to 4.", (38) FuglyDragon (k: 6), who also notes: "1 very successful spwn to date, approx 30 fry raised", (39) thejudgement (k: 3), (40) Gretesam, (41) tcmfish (k: 2), (42) Devin (k: 11), (43) jørn henning flåten, (44) donishi, (45) rodpam, (46) SHEAG35 (k: 32), (47) corydoras, (48) fishpimpin, (49) spwd (k: 5), (50) Rainyfly (p: 2), (51) Nabobmob1, (52) Phreatobius (p: 2), (53) boyneburn, (54) jp11biod, (55) Dee (k: 6), (56) sheldon (k: 6), (57) jpod, (58) SHEAG (p: 2, k: 4), (59) coryla, (60) wgtaylor, (61) rhibear (k: 7), (62) Mark Roesner, (63) christiansen (k: 11), (64) SergenTuncer, (65) reefdive, (66) KansasGuppyGuy (k: 10), (67) Rainbow, (68) donpetty (k: 5), who also notes: "Housed with a C. polystictus and several young C. elegans.", (69) Rita Aspevik (k: 5), (70) AquariumLover04 (k: 7), (71) MHS, (72) matti2uude (k: 6), (73) ars (k: 12), who also notes: "Spawning group", (74) BigToys (k: 2), (75) mace, (76) kim m, (77) tjudy, (78) 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.", (79) leej24, (80) pleco_breeder (k: 6). Click on a username above to see all that persons registered catfish species. You can also view all "my cats" data for this species. Add this species to your "my cats" page.
Breeding Reports	(1) christiansen (b: 12).
More Resources	- CotM 1998 November - Search Planet Catfish for more on Corydoras similis - BBcode (for use in linking to this page from forum posts) - Look up Corydoras similis on AquaticRepublic.com - Look up Corydoras similis on Fishbase, I.T.I.S. or ispecies search. - URL (for use in linking to the species from anywhere on the web)
Hits	22413 hits.
Last Update	2005 Mar 12 00:00 (species record created: 2001 May 04 00:00)

Cat-eLog Data Sheet

Scientific Name

Corydoras similis Hieronimus, 1991

Common Name(s)

Smudge Spot Cory

Type Locality

Trib. of Rio Madeira, vicinity of Ariqumes, Rondonia, Brazil.

Pronunciation

Kory DOOR ass - sim ill iss

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. Latin similis = like alluding to the similarity of the colouration of this species to Corydoras ourastigma.

Species Information

Size

60mm (2.4") 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.

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.

Sexing

Female is fuller (when viewed from above) and larger.

Habitat Information

Distribution

Rio Jamari, tributary of the Rio Madeira, East Rondonia, Brazil
Amazon, Middle Amazon (Solimoes) Show it on a map

, Madeira (hover or click on these areas to show maps or find other species found there)

5.6 - 7.0

Temperature

21.0-27.0°C or 69.8-80.6°F (Show others within this range)

Husbandry Information

Feeding

Flake, 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.

Furniture

Other similar Corydoras, dwarf cichlids and tetras. A robust species that will adapt to larger peaceful tankmates.

Compatibility

A perfect citizen.

Suggested Tankmates

Ideally keep with dwarf cichlids and tetras. A robust species that will adapt to larger peaceful tankmates. Keep in groups of at least six.

Breeding

1. 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.

Further Information

References

Z. 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) Redcatman, who also notes: "Had more, but a couple have died over the years.", (10) Daragh (k: 125), who also notes: "Includes about 100 week old fry.", (11) NEONCORY (k: 24), (12) amygoodness, (13) fulvioander (k: 2), (14) 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", (15) AmLi (k: 16), (16) Mazer, (17) glenny, (18) gem400 (k: 10), (19) foffo (k: 8), (20) MatsP (k: 6), (21) alexmuchtar, (22) thelivelylady, (23) scat35, (24) Gry, (25) gismo5001, (26) Olivier, (27) NHL (k: 4), (28) Birger Amundsen, (29) sarae, (30) jar (k: 4), (31) reticulata, (32) behhl (k: 2), (33) worldwide73, (34) fjack88, (35) Boromark, (36) Kampfer, (37) ranmasan (k: 4), who also notes: "Purchased @ 3/4", these little guys have been my slowest growers even with varied diet and good H2O parameters. Had 8, down to 4.", (38) FuglyDragon (k: 6), who also notes: "1 very successful spwn to date, approx 30 fry raised", (39) thejudgement (k: 3), (40) Gretesam, (41) tcmfish (k: 2), (42) Devin (k: 11), (43) jørn henning flåten, (44) donishi, (45) rodpam, (46) SHEAG35 (k: 32), (47) corydoras, (48) fishpimpin, (49) spwd (k: 5), (50) Rainyfly (p: 2), (51) Nabobmob1, (52) Phreatobius (p: 2), (53) boyneburn, (54) jp11biod, (55) Dee (k: 6), (56) sheldon (k: 6), (57) jpod, (58) SHEAG (p: 2, k: 4), (59) coryla, (60) wgtaylor, (61) rhibear (k: 7), (62) Mark Roesner, (63) christiansen (k: 11), (64) SergenTuncer, (65) reefdive, (66) KansasGuppyGuy (k: 10), (67) Rainbow, (68) donpetty (k: 5), who also notes: "Housed with a C. polystictus and several young C. elegans.", (69) Rita Aspevik (k: 5), (70) AquariumLover04 (k: 7), (71) MHS, (72) matti2uude (k: 6), (73) ars (k: 12), who also notes: "Spawning group", (74) BigToys (k: 2), (75) mace, (76) kim m, (77) tjudy, (78) 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.", (79) leej24, (80) pleco_breeder (k: 6).

Click on a username above to see all that persons registered catfish species. You can also view all "my cats" data for this species.

Add this species to your My Cats species list

Add this species to your "my cats" page.

Breeding Reports

(1) christiansen (b: 12).

More Resources

- CotM

1998

November

- Search Planet Catfish for more on Corydoras similis
Link

- BBcode (for use in linking to this page from forum posts)
Look up AquaticRepublic.com

- Look up Corydoras similis on AquaticRepublic.com
Look up Fishbase

- Look up Corydoras similis on Fishbase, I.T.I.S. or ispecies search.
Link

- URL (for use in linking to the species from anywhere on the web)

Hits

22413 hits.

Last Update

2005 Mar 12 00:00 (species record created: 2001 May 04 00:00)

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