Black-Bar Chromis

Chromis retrofasciata

(0 Reviews)

Black-Bar Chromis

Black-Bar Chromis

Chromis retrofasciata

(0 Reviews)

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Black-Bar Chromis Care Facts

Care Level: Easy
Temperament: Peaceful
Diet: Omnivore
Origin: Indonesia
Acclimation Time: 2+ hours
Reef Safe: Yes
Minimum Tank Size: 30 gallons
Max Size: 2 inches

The Black-Bar Chromis can be found among reefs and lagoons of the Western Pacific Ocean, near Indonesia. They have a golden body with a white caudal fin and a solid black stripe running from the dorsal to the anal fin. They prefer to be in larger groups of five or more and should have plenty of live rock to hide in. While they only reach a maximum of 2 inches, they do require some room to swim. They are not recommended for any tank under 30 gallons and should be kept with fish of similar size and temperament. They eat a variety of foods, including frozen mysis or krill, small live crustaceans, algae, and flakes or pellets. 


Black Bar Chromis (Chromis retrofasciata): Comprehensive Care Guide


Habitat and Natural Environment: Discovering the Origins of Black Bar Chromis


Originating from the Indo-Pacific region, the Black Bar Chromis (Chromis retrofasciata) is commonly found in coral-rich areas, showcasing its vibrant colors amidst the coral branches. Its natural habitat is characterized by clear waters with moderate currents.


Reef Compatibility and Behavior: Understanding the Adaptability of Black Bar Chromis


The Black Bar Chromis is known for its adaptability to reef environments, making it a suitable addition to marine aquariums. It thrives in the presence of live corals, rocks, and open swimming spaces. While generally peaceful, territorial disputes may arise, especially during breeding.


Size, Lifespan, and Sexual Dimorphism: Exploring the Characteristics of Black Bar Chromis


This species typically reaches a size of 3 to 4 inches in captivity. With proper care, Black Bar Chromis can live up to 8 years. Sexual dimorphism is minimal, with both sexes exhibiting similar coloration and size.


Diet in Captivity: Nourishing Your Black Bar Chromis


In captivity, Black Bar Chromis are omnivores. Their diet should consist of high-quality marine pellets, flakes, and frozen foods like brine shrimp and mysis shrimp. Providing a varied diet ensures optimal health and coloration.


Aquaculture and Availability: Sourcing Your Black Bar Chromis is committed to sustainable practices, often providing aquacultured Black Bar Chromis. These specimens are acclimated to aquarium life, ensuring hardiness and adaptability. When not available, uses suppliers that utilize sustainable collection practices.


Tank Requirements: Creating the Perfect Home for Black Bar Chromis


Maintaining ideal tank conditions is vital for the well-being of Black Bar Chromis. A minimum tank size of 30 gallons is recommended, allowing ample space for swimming and territorial behavior. Stable water parameters include a pH of 8.1-8.4, salinity between 1.020 and 1.025, and a water temperature of 74°F to 78°F. Moderate water flow mimics their natural environment.


Juvenile to Adult Coloration Changes: Witnessing the Transformation of Black Bar Chromis


Juvenile Black Bar Chromis exhibit subdued colors that intensify as they mature. Adults boast a striking combination of black bars contrasting with vibrant blue hues, creating a visually appealing display in the aquarium.


Common Names: The Blue and Black Chromis, Retro-fasciata Chromis


Compatible Tank Mates: Building a Community with Black Bar Chromis

  • Firefish Goby (Nemateleotris magnifica): Peaceful, burrows in the substrate, suitable for reef setups.
  • Banggai Cardinalfish (Pterapogon kauderni): Gentle, tends to stay close to shelter, suitable for a peaceful community tank.
  • Yellow Watchman Goby (Cryptocentrus cinctus): Forms symbiotic relationships with pistol shrimp, suitable for reef setups.
  • Royal Gramma (Gramma loreto): Peaceful, vibrant coloration, and suitable for reef setups.
  • Green Clown Goby (Gobiodon atrangulatus): Small and peaceful, suitable for nano reef setups, and perches on corals.

Notes for New Hobbyists: Tips for Keeping Black Bar Chromis

  • Introduce Black Bar Chromis to a well-established tank.
  • Provide hiding spots and structures to reduce potential territorial disputes.
  • Regular water testing and maintenance are essential for their well-being.

Why People Should Buy the Black Bar Chromis from


Purchasing Black Bar Chromis from ensures the acquisition of acclimated and healthy specimens. Our commitment to sustainable practices guarantees a positive impact on both your aquarium and the conservation of marine ecosystems. Visit our website for reliable sources of quality marine fish, contributing to the success of your saltwater aquarium.

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