Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Classis/Subclassis: Actinopteri
Subclassis/Infraclassis: Neopterygii
Infraclassis: Teleostei
Megacohors: Osteoglossocephalai
Supercohors: Clupeocephala
Cohors: Otomorpha
Subcohors: Ostariophysi
Sectio: Otophysa
Ordo: Siluriformes
Familia: Callichthyidae
Genus: Corydoras
Species: Corydoras julii
Name
Corydoras julii Steindachner, 1906
Vernacular names
English: Leopard corydoras
italiano: Coridora leopardo
polski: Kirysek nakrapiany
português: Coridora-leopardo
Corydoras julii (also known as the julii cory or leopard catfish[1]) is a small freshwater catfish native to eastern Brazil. It is often confused with Corydoras trilineatus.[2]
In the aquarium
Julii corys are small peaceful fish. As they are shoaling fish,[3] they should always be kept in groups. They are rarely available commercially; fish labelled as "julii corys" are often misidentified C. leopardus, or three-stripe ("false julii") cory catfish (C. trilineatus)).[4]
They grow to about 2-3 inches . It is recommended that you provide these fish with sinking pellets along with live and frozen fish food.
Physical appearance
Their skin is a whitish-gray, almost transparent color with fine black spotting all over. A more common species, C. trilineatus, which is frequently mis-sold as C. julii, tends to have larger, joined-up spots (reticulations). Distinguishing C. julii from the more commonly available C. trilineatus without locality information can however be difficult, as some C. trilineatus can show the spotted head pattern traditionally associated solely with C. julii. C. julii appears also to have a shorter horizontal mid body stripe not reaching half way along the body.[5]
They grow to less than 2.5 inches long,[6] making them one of the smaller members of the Corydoras family.
Feeding
Corydoras julii, like almost all Corydoras species, are bottom-feeding scavengers. Their diet consists primarily of small invertebrates which they sift from the substrate, expelling the particles of sand and sediment through their gill openings. In aquaria, they can be fed sinking pellets rich in insect and other invertebrate proteins, as well as live or frozen foods such as bloodworms, tubifex, and California blackworms (Lumbriculus variegatus). Although they will often consume sinking algae wafers, these are not considered to be nutritionally appropriate.
Breeding
Sexing corys is not very difficult provided they are in well fed and in good condition. Females are quite a bit rounder than males. Usually cory catfish are bred in groups of two males to one female. They can also be bred in a large school.
The fish will spawn after sexual maturity, during a storm. During this storm, the fish eat increased amounts of insects. The water gradually decreases temperature over the course of a few days .
Corydoras fish spawn in an unusual position. They make a sort of "T formation" as most experts report, the female fish, enticed by the male, swims up to the male's abdomen. She will eat the sperm released by the male fish. the sperm rapidly travels though the female's body and fertilizes the eggs . The female then lays eggs into her pelvic fins. After mating, the female will place the eggs on a surface and repeat this process.
Corys are egg laying fish and will lay small, white, sticky eggs on all surfaces in the aquarium, often on the glass itself. Females lay many eggs at a time though, the catfish will eat most of the eggs unless removed.
References
"Corydoras julii summary page". FishBase. Retrieved 2019-01-07.
https://www.planetcatfish.com/common/species.php?species_id=508
"Corydoras julii • Callichthyidae • Cat-eLog - PlanetCatfish.com". www.planetcatfish.com. Retrieved 2019-01-07.
"Corydoras julii • Callichthyidae • Cat-eLog - PlanetCatfish.com". www.planetcatfish.com. Retrieved 2019-01-07.
"Corydoras(ln9) julii • Callichthyidae • Cat-eLog". PlanetCatfish. 2020-10-22. Retrieved 24 May 2021.
"Corydoras julii • Callichthyidae • Cat-eLog - PlanetCatfish.com". www.planetcatfish.com. Retrieved 2019-01-07.
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