Guapore Cory

Geographic Origin and Biotope: Endemic to the Rio Guaporé basin (which marks the border between Brazil and Bolivia). Inhabits the white and clear waters of rivers, but also oxbows, forest swamps, and flooded zones characterized by very fine sand and dense submerged vegetation.

Taxonomy and Morphology: Medium-sized (5.5 cm / 2.2 inches). Presents a peculiar and fascinating phenotype: a distinct "black patch" positioned very far back on the caudal peduncle, which in swimming imitates the eye of a much larger fish, eluding predators. Round snout shape.

Social Behavior: Among all Corydoras, the guapore is known for its "mid-water" swimming style. It spends a lot of time raised from the bottom "hovering" or swimming freely in the water column. Extremely gregarious, it demands large groups (10+).

Coloration and Sexual Dimorphism: "Dalmatian" livery: light body finely spotted with dark over almost the entire surface. A colossal round black spot adorns the tail (eye-spot). Dimorphism not obvious except in shape: females seen from above are almost spherical in the ventral area.

Aquarium Setup: Being a mid-water swimmer, it needs wide open spaces for free swimming. The bottom must strictly be sandy (silica). Important to set up shelters with tall aquatic plants (Vallisneria, Echinodorus) where they can rest.

Diet and Feeding: In nature, it collects suspended zooplankton and benthos. In the aquarium, it eagerly accepts live brine shrimp nauplii, daphnia, and cyclops, as well as sinking granules and chips with a protein base (krill, fish). Never rely only on food scraps.

Water Quality: Recommended temperatures between 22 and 26°C (72-79°F). Hardness GH 2-12 and pH between weakly acidic and neutral (6.0 - 7.2). Mandatory maintenance with generous weekly water changes to reduce nitrates, otherwise rapid fin clamping and wasting.

Compatibility and Tankmates: The ideal tankmate for delicate Amazonian communities. Pairs wonderfully with Nannostomus, Carnegiella, and small Tetras. Its habit of swimming raised from the bottom makes it vulnerable to territorial dwarf Cichlids during breeding.

Aquarium Reproduction: Obtained by stimulating them with large cold thermal shocks. Reproduction in T-position culminates with the release of large clear eggs on smooth supports and leaves in the current. Breeders will systematically devour the clutches if not removed.

Risks and Diseases: The lack of a large conspecific group causes stress and immune collapse. Highly sensitive to pollution and barbel atrophy on sharp gravels. Fatal toxicity to Copper and many aggressive commercial curatives.