Corydoras trilineatus
Almost always sold under the name 'Julii Cory' — true *Corydoras julii* is rare in the trade. The reticulated pattern is finer than *C. julii* (a network rather than spots). Hardy, sand substrate is kinder to barbels than gravel.
False Julii Cory (Corydoras trilineatus) reaches 5–6 cm as an adult and needs a minimum tank of 75 L. Native to Upper Amazon, it lives in the bottom water column with a peaceful temperament. Aim for 22–26 °C, pH 6.0–7.5, and 2–15 dGH hardness. Lifespan is 5–7 years with good care. Keep false julii cory in groups of 6+, yes schoolers need numbers to display natural behaviour. Diet: omnivore, Sinking pellet, frozen bloodworm and brine shrimp, scavenges leftovers. Plant-safe: Yes. Shrimp-safe: Yes (with adults).
Care at a glance
Almost always sold under the name 'Julii Cory' — true *Corydoras julii* is rare in the trade. The reticulated pattern is finer than *C. julii* (a network rather than spots). Hardy, sand substrate is kinder to barbels than gravel.
By Mike ElmiraUpdated 1 min read
Part of our complete guide to aquarium fish for the planted tank.
The parameters that decide whether false julii cory fits in your tank.
Bottom
Yes
Group of 6+
Callichthyidae
Omnivore
Sinking pellet, frozen bloodworm and brine shrimp, scavenges leftovers.
5–7 yrs
Medium
Upper Amazon
Upper Amazon
Tank-mate safety and the species this one is documented to thrive (or fail) alongside.
Direct answers to the questions search engines and AI assistants surface most often about this species.
False Julii Cory (Corydoras trilineatus) needs a minimum tank of 75 L. They live in the bottom water column and should be kept in groups of 6+, so a longer footprint matters more than depth.
Target 22–26 °C, pH 6.0–7.5, and 2–15 dGH hardness. Acclimate slowly when moving them between water sources.
Shrimp safety: Yes (with adults). Plant safety: Yes.
False Julii Cory are omnivore. Sinking pellet, frozen bloodworm and brine shrimp, scavenges leftovers.
On Fin & Stem's 1–5 difficulty scale this species rates 1/5. Almost unkillable, a solid first-tank choice. Breeding difficulty: medium.
Typical lifespan in a well-maintained tank is 5–7 years.
A planted tank is a system. Pair this fish with one entry from each other pillar to plan the whole scape.
