Convict julie

Aquarium fish: Convict julie (Julidochromis regani)
Size: 15 cm
Origin: Tanganyika
Water temperature: 23-27 ° C
Aquarium volume: 110 l

Convict julie (Julidochromis regani ) – aquarium fish, a representative of the group of fractures of the cichlid family.


The species is native to Africa . Endemic, it inhabits only the rocky littoral along the entire Lake Tanganyika. Found among rocks at a depth of approx. 5 m to 11 m.

Characteristics and disposition

Regan’s scalp differs from other representatives of the genus Julidochromis primarily in size. In nature, these fish can reach up to 30 cm in length. In an aquarium, an adult female can grow up to about 15 cm and a male 10 cm. They are characterized by an elongated yellow or brown body with four dark stripes. Their dorsal fin has more than 20 hard rays, rounded caudal fin.

Depending on the occurrence, they may vary in color. The most famous variants are: Kachese, Kipili (three stripes on the body) , Gombi, Kigoma, Zambia Gold, Sumbu Gold, Burundi. Gender of young fish is difficult to distinguish. During the spawning period, males have a pointed genital wart and females are slightly more rounded. Active and quite tolerant fish, but territorial and aggressive towards other scalp.

They prefer to stay in the lower parts of the reservoir. They do not change the district chosen once. Monogamous – they mate for life and form multi-generation families.

Nutrition and feeding

Omnivores in nature, feed on plankton and small invertebrates found among algae. In the aquarium, they gladly take all live, frozen and dry food.

Good quality flake foods supplemented with cyclops, insect larvae, artemia, crustaceans and other special foods for Lake Tanganyika fish and plant foods may be given. Feeding is recommended 2 to 5 times a day with smaller portions.


For a matched pair , a 110-liter aquarium with a sandy surface and not too bright lighting is recommended . Decorations made of rocks and stones stacked on top of each other are necessary, so that the structures create as many nooks, crevices and caves as possible. In this way, we provide weak fish with the possibility of hiding, in the case of high aggressiveness on the part of stronger individuals, as well as a place to set up a nest.

They do not tolerate changes in the design of the reservoir and larger water changes , which should not exceed 15%. The water should be well-oxygenated, medium-hard with a temperature between 23 and 27 and between 7.5 and 9.0 pH. These fish do not damage plants. In an East African biotope aquarium, they can be kept with other Lake Tanganyika cichlids. In a traditional social aquarium with fish with similar environmental requirements.

Suitable companions include, for example, Trophyuses, Princesses ( Neolamprologus ) or the species Altolamprologus and Cyprichromis. They show territorialism and intra-species aggression. In smaller aquariums, fish that cover similar areas should be avoided, and armored fish, if you are thinking about rearing offspring.


Easy, but we have to be patient. It is recommended that you buy a group of 6-10 young fish and wait for them to pair naturally.

This process can be long and sometimes takes more than a year. As soon as a pair is formed, the remaining specimens should be placed in a separate tank. The purchase of an adult male and female is contraindicated and has a low chance of success. The aquarium, decorated as described above, should have a minimum of 110 liters of capacity. The optimal water parameters are the pH of about 8.2-9.0 and the temperature of 26 ° C.

Cashews breed in secret. It reproduces between the nooks and crannies of rock clusters. An adult female can lay about 300 eggs (usually less) on a cave wall or ceiling. We usually find out about the enlargement of the family only when the young leave the grotto. The female takes care of the offspring and the male defends the territory.

Fry up to 2.5 cm long remain near the nest and help to look after the next litter and guard the territory. Older specimens are chased away. Larger substitutions or changes to the tank decoration can disturb the steam. The fry after leaving the nest are quite large and can be immediately fed with artemia, brine shrimp larvae or other small food.


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