Saltcorner
By Bob Goemans
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Chromis

Chromis margaritifer

Fowler, 1946

Bicolor Chromis, Black and White Chromis

Likely Reef Tank Suitable

Likely Fish-Only Tank Suitable

Range: Indo-West Pacific Ocean: Cocos Keeling to French Polynesia, north to Southern Japan, and south to Lord Howe Island.

Size: 3 inches (9 cm)

Natural Environment: Inhabits coastal reefs where algae and corals exist at depths between 6 to about 50 feet (2 – 15 m) and feeds mainly on planktonic crustaceans (copepods, mysis, and shrimp larvae), fish eggs, and algae.

General Husbandry: An attractive species having a body that is black until it reaches the caudal peduncle, which it and the tail are white, with white on the rear portions of the dorsal and anal fins.

As with most Chromis species, 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.

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: 70 - 84°F (21 – 28°C)

Specific Gravity: 1.020 - 1.026

pH: 8.0 - 8.5

 Chromis margaritifer (Bicolor Chromis, Black and White Chromis)
Photo © David Cook
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