Introduction

The Julii corydoras is an ideal aquarium fish that is loved by aquarium hobbyist for their attractive appearance and personalities.  It is also known as Julii Cory, Julii Catfish and Leopard Cory. It is indigenous to the lower Amazon region, primarily the Parnaíba River of Brazil. It inhabits in flooded forest regions, small creeks, sandy pools, coastal rivers and their small tributaries.  They prefer water with a temperature range of 73 – 79°F, a pH of 6.5-7.8 and a hardness level from 5 to 19 dGH. They are schooling fish and they typically form school with 20 to 30 individuals.

Julii Corydoras’s Overview

The Julii Corydoras is a small sized fish with a shorter head and rounded snout. The body is silvery grey in color with a dark zigzag stripe that runs along the lateral line from the gills to the caudal fin. It has distinctive black dots on its head and body. The dorsal fin is transparent with a large black spot on the upper side of fin. The caudal fin is moderately forked that has unconnected vertical rows of dark brown spots. The anal, adipose, pectoral and pelvic fins are paler in color with spots. The body is lack of scale but body bears overlapping hard plates or scutes. It is a bottom scavenger catfish with inferior terminal mouth that is surrounded by sensitive barbels. The julii corydoras is omnivorous fish and in wild, its foods mainly consist of worms, crustaceans, insect larvae and plant matters. In captive condition, they accept a wide range of commercial foods including tablets, granules and flakes, live or frozen foods such as bloodworm, white worm, grindal worm, Daphnia and Tubifex. It also accepts algae wafers, Cory pellets, shrimp pellets and most plant and vegetable matter. It grows up to 6 cm in length and can live up to 5 years or more.

Scientific Name: Corydoras julii

Common Name: Julii Catfish, Julii Cory, Leopard Cory

Origin: Lower Amazon River, Brazil

Adult Size: 6 cm in length

Behavior: Peaceful

Tank Level: Bottom dweller

Minimum Tank Size:  10 gallons

Diet: Omnivore

Breeding: Egg layer

Care level: Easy

Water pH: 6.5-7.8

Water Hardness: up to 20°dGH

Water Temperature: 73 – 79°F

Lighting:  Moderate – normal lighting

Lifespan:  5 years or more

Background of Julii corydoras

The Julii corydoras (Corydoras julii) was first described by Austrian zoologist and ichthyologist Franz Steindachner in 1906.  This is ray finned fish which belongs to the family Callichthyidae under order Siluriformes of class Actinopterygii. The body of this fish does not bear scales but they have two rows of overlapping bony plates which is also known as scutes that runs down each side of the body. The genus name Corydoras is derived from the Greek kory meaning helmet and doras meaning skin. It is originated from Piauí Rivers, Parnaíba, Brazil.

Housing Julii corydoras

The Julii Corydoras is very peaceful fish and it does well in a community aquarium with other small catfish. It requires at least 10 gallons tank but larger is recommended. The tank should be well planted with pieces of bogwood, a dark substrate and some open areas for swimming with plenty of hiding places. This fish should be kept in a school of at least six or more individuals. Suitable tank mates include Danios, Rasboras, and Dwarf Cichlids, small characins, cyprinids, anabantoids and other peaceful catfish as well as any small peaceful community fish.

It should not be kept with any large or aggressive fish. The Corydoras is sensitive to water parameters and quality. It prefers slightly acidic to slightly alkaline water (6.5-7.8) with water hardness of up to 20°dGH. The tank water should be well filtered and well oxygenated.

Recommended Plants

Check out recommended plants for Julii Corydoras

Feeding Julii corydoras

The julii corydoras is omnivorous fish and in wild, its foods mainly consist of worms, crustaceans, insect larvae and plant matters. In captive condition, they accept a wide range of commercial foods including tablets, granules and flakes, live or frozen foods such as bloodworm, white worm, grindal worm, Daphnia and Tubifex. It also accepts algae wafers, Cory pellets, shrimp pellets and most plant and vegetable matter. They are most active at night, so feeding is done once before lights out is typically enough. It is slower eater and it should be allowed at least 30 minutes to consume their food during feeding.

Breeding Julii corydoras

The julii corydorfas is an egg laying fish and the female lays white, sticky eggs on all surfaces in the aquarium. Adult Julii Corys do not guard the eggs or care for. The breeding tank should be well planted with live or fake plants and fine gravel or sand on the bottom. The tank water should be soft with a slightly acidic to neutral pH (6.5 -7.0), a temperature of 75°F.  Before spawning, brooder should be conditioned with live foods, such as bloodworms or Daphnia and frozen or freeze dried foods such as bloodworm, white worm, grindal worm and Tubifex. When the belly of the female is noticeably swollen with eggs, 50% tank water should be changed with very soft water that helps to trigger spawning. After laying eggs, the parents should be removed from the breeding tank to prevent eating the eggs.  Eggs hatch in three to five days.  The fry should be fed with baby brine shrimp, micro worms or rotifers and crushed flake food.

Sexing Julii corydoras

It is easy to make difference between male and female. The female has larger and heavier body with rounder belly than male. Overall the female is larger and during breeding season when belly bears full of eggs it looks noticeably plump.

Julii corydoras for sale and where to buy

The Cory is very popular fish among the aquarium hobbyist due to their beautifully distinctive bold color pattern. These fish certainly have great personalities and are very common community tank fish. This catfish is very active and most entertaining to watch. To buy your julii, see below online vendor and order them that I would recommend from.