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

Jump to next section Cat-eLog Data Sheet
Scientific Name Corydoras similis  Hieronimus, 1991
Common Name 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.
Articles
Article - CotM 1998 November
Jump to next section Species Information
Size 60mm or 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.
Jump to next section Habitat Information
Distribution Rio 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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pH 5.6 - 7.0
Temperature 21.0-27.0°C or 69.8-80.6°F (Show species within this range)
Jump to next section 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.
Breeding Reports There are 11 breeding reports, read them all here.
Jump to next section Further Information
References Z. Fischkundev. 1 (no. 1) - pp39 - Fig. 1
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Last Update 2005 Mar 12 00:00 (species record created: 2001 May 04 00:00)