Corydoras gladysae

About

A diminutive armored catfish from a very narrow range, Corydoras gladysae was described from the Calchaquí River in the sub-Andean foothills of Salta Province, Argentina, where it lives among rocks in fast-flowing, cool water. It belongs to the family Callichthyidae, whose members carry rows of bony plates instead of scales. A trait that gives the group its common "armored catfish" nickname. What sets this species apart from its many relatives is a suite of physical adaptations to life in current: unusually short dorsal and pectoral fin spines, a flattened body profile, ventrally angled pectoral fins, and a subtly cryptic color pattern. Some of these traits echo features normally associated with the related genus Aspidoras, though the skull structure places it firmly within Corydoras. Like all members of the family, it can gulp atmospheric air using a specialized, highly vascularized section of intestine. A handy survival tool in oxygen-poor conditions, and something you'd notice in a home tank as occasional surface dashes. One practical note for anyone who handles corydoras: the stiffened pectoral spines can pierce skin and cause real pain, and glandular secretions at the spine base may have mild toxic properties. As things stand, this species is essentially absent from the hobby and is unlikely to appear in the trade given its remote and restricted habitat.