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  • Corydoras arcuatus
Jump to next section Cat-eLog Data Sheet
Scientific Name Corydoras arcuatus  Elwin, 1938
Common Names CW036, Super Arcuatus Cory
Buepansermalle (Denmark), Bågpansarmal (Sweden)
Type Locality Amazon River (aquarium specimen).
Pronunciation Kory DOOR ass
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. This specific epithet refers to its bowed (arcuatus=bowed, as in bent like an archer's bow) colour pattern.
Jump to next section Species Information
Size 70mm or 2.8" 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.

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. Corydoras arcuatus is very similar to Corydoras granti. C. arcuatus can be distinguished by having a longer, straight snout, whereas C. granti has a shorter, more rounded snout. Also, the posterior margin of the pectoral fin spine of C. arcuatus has serrations pointing toward the origin of the spine (toward the body), whereas these serrations point toward the spine tip on C. granti. Finally, when full grown, C. arcuatus is a larger species than C. granti.
Sexing Females 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 Remarks Corydoras arcuatus is very similar to C. granti , and specimens of C. granti are often sold by pet stores under the name C. arcuatus. A key to the arc-striped corys can be found in the forum HERE.
Jump to next section Habitat Information
Distribution Brazil, 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
Feeding Will 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.
Furniture Shade 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.
Compatibility A peaceful, shoaling, community fish.
Suggested Tankmates All 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.
Breeding Unreported.
Breeding Reports There is no breeding report.
Jump to next section Further Information
References Annals and Magazine of Natural History (Series 11) v. 3 (no. 13), pp 126, Pl. 3.
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Last Update 2019 May 05 06:12 (species record created: 2004 Jul 11 00:00)