Saltcorner
By Bob Goemans
Site Supported in Part by:
Polyp Lab 

Chromis

Chromis retrofasciata

Weber, 1913

Blackbar Chromis

Likely Reef Tank Suitable

Likely Fish-Only Tank Suitable

Range: Indo-West Pacific Ocean: Indonesia to Fiji, north to Southern Japan, and south to New Caledonia.

Size: 2 inches (5 cm)

Natural Environment: Inhabits coral rich clear water lagoons and seaward reefs at depths between 40 to about 400 feet (12 – 120 m) where it feeds mainly on planktonic crustaceans (copepods, mysis, and shrimp larvae), fish eggs, and algae.

General Husbandry: Quite attractive, having a yellowish body with a black vertical bar at the aft portion of the body.

As with most Chromis species (unless noted differently), quite hardy, peaceful, and better maintained in small groups of at least five to seven members. Should be given wide-open swimming areas, as they are open water swimmers almost always in the upper aquarium areas, and non-aggressive tankmates.

As to diet, will eat most regular aquarium foods, e.g., live fortified brine shrimp and/or finely chopped various frozen or fresh meaty foods such as mysis, squid, fish flesh, shrimp, clam, etc., and plant material, e.g., flake foods, especially those containing Spirulina and should be offered several times daily.

Taxonomy:

    Order: Perciformes

    Suborder: Labroidei

    Family: Pomacentridae

    Subfamily: Chrominae

    Genus: Chromis

FYI: Even though quite passive and will ignore other fish in the aquarium, larger aquariums, e.g., 50 gallons and above for this species provide far more openness for small shoals to ‘peacefully’ coexist.

In smaller aquariums, only one per aquarium is recommended, as it will fight with conspecifics.

If maintained in groups of less than mentioned above, they tend to be over dominate of each other and may force some members into hiding. The bigger the group, the less intergroup picking on each other exists.

Experience Level: Beginner

Temperament: Peaceful

Diet: Zooplanktivore/Omnivore

Coral Safe: Yes

Invertebrate Safe: Yes

Acclimation Time: 30 minutes+

Aquarium Environment: Reef or fish-only aquarium

Tankmates: Peaceful

Minimum Tank Size: 50 gallons

Temperature Range: 72 - 82°F (22 – 27°C)

Specific Gravity: 1.020 - 1.026

pH: 8.0 - 8.5

 Chromis retrofasciata (Blackbar Chromis)
Photo © David Cook
Site Supported in Part by:
AquaLogic