The julii cory is a small catfish native to coastal river systems south of the Amazon delta in northeastern Brazil. It generally attains an adult size of just over 2 inches in length. Females tend to grow larger than males, and sexually mature individuals are noticeably broader and deeper-bodied than males.
Like all cories, julii cories are facultative air breathers and possess a modified, highly vascularised intestine which has evolved to facilitate the uptake of atmospheric oxygen and aid their survival in oxygen deprived environments. In the aquarium you will occasionally see them rising to the surface to take in gulps of air.
The stiffened pectoral fin spines of the julii cory are capable of piercing human skin and producing a ‘sting’ that can be very painful, so care should be exercised when handling them. It is thought that secretions from the axillary glands at the base of each spine may even be mildly toxic or venomous.
The julii cory should be kept in a 20 gallon or larger aquarium. A fine sand (CS7581) or rounded gravel substrate with various rocks and pieces of drift wood (ZM2000), along with live plants will make this shy fish most comfortable. Moderate water flow and subdued lighting is preferred.
The julii cory prefers a water temperature of 68°F to 80°F, a pH of 5.5 to 7.5, and a hardness of 2-12 °H. Excellent water quality is a must.
Corydoras species are foraging omnivores, and most will accept sinking dried foods as well as small live and frozen foods. Feeding a varied diet will ensure the fish are in optimum condition. Shrimp pellets (OSI7346), frozen blood worms (SF4791), and live black worms all make excellent food choices, The julii cory will primarily be a bottom feeder so make sure they get their share of food if kept with other species that inhabit the higher levels of the aquarium. They should not be expected to live solely on leftovers.
The julii cory is peaceful and gregarious. It should be maintained in a group of at least 4 to 6 individuals. It is a very peaceful fish with other species and will fit in well in a community aquarium. Tetras, rasboras, dwarf gouramis, and other small peaceful species such as live bearers and dwarf cichlids all make excellent tank mates.