Three-lined Corydoras Pet of the Month
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Captain Retardo

Fish Herder
Feb 25, 2006
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Minnesota, USA
Common Names: Julii Corydoras, Three-Lined Corydoras, False-Julii Corydoras

Scientific Name: Corydoras trilineatus

Distribution: Peruvian amazon: Rio Ampiyacu, Rio Ucayali and the Yarina Cocha. Ecuador: Rio Pastaza. (from

Family: Callichthyidae

Adult Size: 2 inches

Care: A hardy fish, keep the aquarium clean and have hiding places. Sand or rounded gravel is required, as sharp pieces of gravel will eventually destroy Cory's barbels. Temperature of 70-78 Fahrenheit. Not too fussy about pH, as long as it is reasonable. Remember to keep Cories in groups of 4 or more.

Feeding: They will eat anything that hits the bottom, mine especially relish sinking shrimp pellets. Don't make the mistake of thinking it is a scavenger and will find all its food in the sand, Cories need to be fed just like any other fish.

Sexing and Breeding: Just like other Corydoras species. Sexing: Females are fatter when looked at from above.
Breeding: Like other Cories, breeding requires a water change with cooler water (preferably a large water change, while making a lot of splashes on the surface), live and frozen food leading up to breeding is also beneficial.

Comments: These fish are often mislabeled at LFS's as Julii Corydoras, the actual Julii Cory (Corydoras julii) has spots on its head, while Corydoras trilineatus spots are reticulated (connected).

A few old pics of my Corydoras trilineatus:


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