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  • Corydoras arcuatus
Jump to next section Cat-eLog Data Sheet
Scientific NameCorydoras arcuatus  Elwin, 1938
Common NamesCW036, Super Arcuatus Cory
Buepansermalle (Denmark)
Type LocalityAmazon River (aquarium specimen).
PronunciationKory DOOR ass
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. 
Jump to next section Species Information
Size 70mm or 2.8" 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.

The colour pattern forms an even arch (hence the scientific name) of dark stripe from the snout to the lower back. Sometimes the cleithrum will have an iridescent gold or bronze color.
SexingFemales grow larger and are more full-bodied, this is best observed from above the fish. Males will typically have more pointed as opposed to more rounded fin tips as they mature.
General RemarksCorydoras arcuatus is very similar to Corydoras sp. C020; specimens of C020 are often sold by pet stores under the name C. arcuatus.
Jump to next section Habitat Information
DistributionBrazil, Rio Madeira, Humaitá.
Amazon, Middle Amazon (Solimoes), Purus (click on these areas to find other species found there)
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Jump to next section Husbandry Information
FeedingWill accept a wide range of commercial foods including tablets, granules and flakes. Live (or frozen) foods such as bloodworm, white worm, grindal worm, Daphnia and tubifex are readily accepted.
FurnitureShade provided by overhanging rock work, arching bogwood, tall or floating plants are all that is required. Ideally substrate should be sand, but rounded gravel is an imperfect alternative. Avoid keeping over rough edged (chipped) gravel, this will increase this risk of damage the fishes barbels when it tries to dig.
CompatibilityA peaceful, shoaling, community fish.
Suggested TankmatesAll Corydoras should be kept in groups of at least 6 of the same species. Otherwise compatible with most other types of fish that are reasonably peaceful, as long as they don't see a Corydoras as a snack.
Jump to next section Further Information
ReferencesAnnals and Magazine of Natural History (Series 11) v. 3 (no. 13), pp 126, Pl. 3.
Registered Keepers(1) funkyj1313, (2) loafingloach (k: 3), who also notes: "similar to arcuatus (duh). both are pretty sensitive. It had barbel loss in a tank I was breeding other cories in.", (3) Daragh, (4) gamiller, (5) observant person, (6) nvcichlids (k: 9), (7) fjack88, (8) Kampfer, (9) Fred T. Washington, (10) wdh21, (11) Coryologist (k: 4), (12) fleshgear, (13) protopterus, (14) Maxpedley, (15) Monkeh (k: 12), (16) Mexnotex, (17) dennis84.

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Breeding ReportsNone.
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Last Update2017 Sep 27 01:18 (species record created: 2004 Jul 11 00:00)