Breeding Julidochromis ornatus (Ornate Julie)

Breeding the Ornate Julie (Julidochromis ornatus): a bi-parental cave spawner from Lake Tanganyika that pairs for life and gives long-lived brood care.

Overview

Julidochromis ornatus, the Ornate Julie, is a slender rock-dwelling cichlid from Lake Tanganyika reaching about 8 cm. It is a bi-parental cave spawner. Bonded pairs remain together for life, making it one of the more straightforward small Tanganyikan cichlids to breed once a pair is established.

Sexing

Sexing is subtle: males have more extended and pointed genital papillae, while females are notably larger as adults. Pairs are best produced by buying a group of young fish and allowing natural pair formation, which may take a year or more.

Conditioning

Maintain hard, alkaline water; Seriously Fish recommends a pH of around 8.2-9.0 and a temperature of about 25-27 C (77-80 F) for breeding. A varied carnivorous diet brings the pair into condition.

Breeding Setup

Provide an aquarium of at least 90 cm (36 in) in length with sand and rock caves and crevices. A stable cave that the pair can claim and defend is central to spawning.

Spawning Behavior & Trigger

Pairs may show increased activity around the selected cave for up to a month before spawning. The female deposits the eggs on the wall or roof of the cave while the male guards the perimeter. Females lay up to 100 eggs, but usually far fewer.

Egg & Fry Care

Eggs hatch within 2-3 days. Newly released fry retain yolk sacs and need no feeding until these are depleted, after which they are large enough to take brine shrimp nauplii. Parental care is long-lived, with fry remaining with the parents until about 2.5 cm (1 in), when they should be removed to prevent predation.

Common Challenges

Forming a bonded pair takes patience, often a year or more from a group. Once paired, the main task is removing older fry before they are predated as the parents continue to spawn.