Mosaic Cory

Geographic Origin and Biotope: South America: widespread in the Amazon basins of central-western Brazil. Its natural ecosystem consists of slow-flowing streams, ponds, and flooded forests, where the sandy or muddy bed is shielded by dense jungle.

Taxonomy and Morphology: Often confused in stores with C. sterbai due to the similar pattern. C. haraldschultzi, however, has an elongated snout (long-snouted) that clearly distinguishes it from sterbai (short-snouted), and reaches slightly larger sizes (6.5 - 7 cm / 2.5 - 2.8 inches).

Social Behavior: Extraordinarily tame and strictly gregarious. Isolating specimens or keeping them in pairs is considered an ethological abuse: in schools (minimum 6) they show fascinating social interactions, assiduously exploring every crevice on the substrate.

Coloration and Sexual Dimorphism: Has a "reticulated" pattern, but with a key difference: in haraldschultzi the body has a white/cream background furrowed by dark stripes and spots (while in sterbai the background is dark with light spots). Males are more slender and shorter than gravid females.

Aquarium Setup: Pure Amazonian aquarium. A sandy bottom is the only acceptable one for its long digging snout. Tortuous branches, roots (Spiderwood) covered with Epiphytes (Anubias, Ferns) offer visual shelter that enormously calms the school.

Diet and Feeding: Omnivore with carnivorous preferences. Feeds actively by rummaging deep in the sand. Must receive targeted meals with sinking protein tablets, to be supplemented on a regular basis with large frozen bloodworms and brine shrimp.

Water Quality: Recommended temperatures between 22°C and 26°C (72-79°F) (it does not tolerate 28-30°C/82-86°F well like C. sterbai does in Discus tanks). Low or moderate hardness (GH 2-12) and pH between 6.0 and 7.2. Frequent superficial siphoning is indispensable.

Compatibility and Tankmates: Exceptional community species. Must be paired exclusively with peaceful fish: a classic biotope includes thick schools of Cardinals or Rummy-nose tetras, phytophagous Loricariids, and moderate dwarf Cichlids. Loaches or other frantic bottom fish are not recommended.

Aquarium Reproduction: Develops eggs in T-position after robust cold partial changes and intensive live feeding. The viscous and resistant eggs are stuck on the glass or under broad leaves. Breeders must be extracted to prevent post-spawning cannibalism.

Risks and Diseases: Calcareous, sharp, or rough substrates cause fungal lacerations of the long and pointed barbels, leading the species to necrosis and death. Like the whole genus, it dies rapidly if treated with copper-based or malachite green cures at high doses.