Masked Julie (Julidochromis transcriptus)
Also known as: Black-and-White Julie, Transcriptus Julie
 
Overview
The Masked Julie is one of the smallest and most attractive Julidochromis species from Lake Tanganyika. Its bold black-and-white patterning, combined with a distinctive “mask” across the face, makes it stand out in rocky tanks. Despite its small size, it is territorial—especially when breeding—but generally calmer than larger Julies.
An excellent choice for smaller Tanganyikan setups.
 
Scientific Name
Julidochromis transcriptus
Adult Size
5–6 cm (2–2.5 inches)
One of the smallest Julidochromis species.
Lifespan
8–10 years
 
Temperament
Semi-aggressive, territorial around caves
Best kept as:
Single pair in tanks under 100 L
Groups only in larger, heavily structured tanks
 
Tank Size
Minimum 60 L (15 gallons) for a pair
100 L+ for mixed Tanganyikan communities
 
Water Parameters
Lake Tanganyika conditions:
Temperature: 24–27°C
pH: 7.8–9.0
Hardness: Hard to very hard (10–20+ dGH)
Alkalinity: High KH essential
 
Diet
Omnivorous micro-predator
Accepts:
Premium cichlid pellets/granules
Frozen brine shrimp, mysis, daphnia
Live foods (grindal worms, daphnia)
Spirulina-based foods for digestive balance
Avoid high-fat foods like tubifex.
 
Tank Setup
Aquascape: Rocky setup with caves, small crevices, broken rock piles
Substrate: Fine sand
Plants: Optional (Anubias, Vallisneria, Java fern)
Flow: Moderate, stable
Lighting: Moderate
Water quality: Very stable, oxygenated, high pH/KH
Ensuring plenty of hiding spots reduces territorial stress.
 
Behaviour
Forms monogamous pairs
Territorial around a chosen cave area
More peaceful than ornatus or marlieri
Suitable tankmates:
Shell dwellers (in larger tanks)
Cyprichromis species
Small Altolamprologus (careful)
Gobies (Eretmodus, Tanganicodus)
Avoid boisterous species like Tropheus.
 
Breeding
Very rewarding species to breed:
Spawns inside narrow caves
Female stays with eggs; male defends perimeter
Fry grow slowly but receive long-term parental care
Feed fry:
Baby brine shrimp
Crushed high-protein fry food
Fine powdered spirulina
Will produce multiple broods if conditions remain stable.