Regan's Julie

Geographic Origin and Biotope: Lake Tanganyika (Endemic). Widespread geographical variants (Kipili, Kipimbi, Kerenge). Lives in the low rocky zone (up to 10 meters / 32 feet), preferring smooth boulders on light sandy bottoms.

Taxonomy and Morphology: Regan's Julie / Striped Julie (Julidochromis regani). One of the giants of the family, long and muscular (up to 13 cm / 5 inches in aquarium). Torpedo-shaped body, much wider and more robust mouth than the ornatus cousins.

Social Behavior: Fierce dominator. An adult regani will claim a vast stretch of reef as exclusive territory. Sub-dominant males are relegated to the upper corners of the tank, stripped of their colors.

Coloration and Sexual Dimorphism: Beige-cream background (up to intense yellow in Kipili variants) cut by 4-5 thick uninterrupted horizontal black stripes, from snout to caudal peduncle. Throat invariably light. Females larger than males.

Aquarium Setup: Spacious Tanganyika aquarium (100-120 cm / 40-48 inches min). Requires a rocky "terraced" layout with heavy stone slabs (e.g. Slate) overlapping to form impregnable shelters. Coral or silica sand.

Diet and Feeding: Invertebrate gleaner. In addition to the algal aufwuchs, actively hunts small snails, planaria and shrimp. Offer live/frozen food (brine shrimp, mysis) balanced with hard vegetable pellets to file teeth.

Water Quality: Pure Tanganyika water. Extremely high carbonate hardness (KH 12+) and pH above 8.0. The tank needs wavemakers to replicate the strong surface wave motion.

Compatibility and Tankmates: Excellent for Tanganyika communities with free high-swimming fish (Cyprichromis, Paracyprichromis). Can attack shell-dwellers (Neolamprologus) if their territory closely borders its rockery.

Aquarium Reproduction: Vault spawning. The couple isolates for weeks in unreachable caves; the eggs (100+) hatch on the rocky ceiling. They create multigenerational colonies in which the young are admitted up to 3 cm (1.2 inches) in size.

Risks and Diseases: Fratricide. Inserting two unformed adults (not a pair) or moving the furnishings will infallibly lead to the killing of one of the two specimens within 24 hours due to territorial fury.