Aqua-Pedia 🐠 Shared tanks
🌐 English
Fish

Black-bar chromis

Chromis retrofasciata
French name : Chromis retrofasciata

The black-bar chromis (Chromis retrofasciata) is a small marine damselfish of the family Pomacentridae, native to reefs of the western Pacific. It has a dusky brown to greyish body marked by a dark vertical bar near the tail base, giving it a subtle but attractive appearance well suited to smaller reef systems. It is one of the more peaceful damselfish and can be kept singly or in small groups, where it hovers near cover rather than roaming aggressively. Its calm nature makes it a good reef community fish. A reef aquarium with plenty of live rock and branching coral for shelter suits it well, as it retreats quickly when startled. It feeds on zooplankton and accepts a range of small frozen and prepared foods offered in frequent small portions. Reef-safe with corals and invertebrates. Occasional captive breeding has been reported but is not commercially common.

Water
Marine
Origin
Reefs, western Pacific
Adult size
6 cm
Diet
Planktivore
Temperament
Peaceful
Difficulty
Intermediate
Keep in group of
3+
Black-bar chromis (Chromis retrofasciata)
Illustration

Water parameters

Temperature24 – 27 °C
pH8.1 – 8.4
Carbonate hardness (KH)8 – 12 °dKH
Salinity33 – 35 SG

Tank & stocking

Minimum tank volume100 L
Volume budget per individual 15 L — adds up with tank-mates
Minimum group size3 individuals (shoaling)

“Minimum tank volume” is a reasonable floor, not an absolute limit. The per-individual budget is used by the Aqua app to estimate how heavily a tank is stocked.

Frequently asked questions

What size aquarium does Black-bar chromis need?

Provide at least 100 litres for a small group to keep Black-bar chromis in good conditions.

What water parameters does Black-bar chromis need?

A temperature of 24–27 °C, pH 8.1–8.4, saltwater.

Is Black-bar chromis peaceful or aggressive?

Its temperament is peaceful.

What does Black-bar chromis eat?

Its diet: planktivore.

How many Black-bar chromis should be kept together?

It is a social species: keep a group of at least 3.

How big does Black-bar chromis get?

Around 6 cm as an adult.

Is Black-bar chromis suitable for beginners?

Care level: intermediate.

Planning a tank with Black-bar chromis?

AquaTender turns these parameters into live advice: it checks whether your tank is big enough, how heavily it's stocked, and whether your fish are compatible — then tracks water tests, photos and maintenance for you.

➕ Add Black-bar chromis to my tank Discover AquaTender
« Add to my tank » opens AquaTender — sign in (free) and pick your aquarium.

Fish from the same biotope

Report an error on this page

Care data is community-assisted. Spotted something wrong? Let us know — it won't change the page instantly, but it goes to moderation.

Care data is generated and manually reviewed; always cross-check before major decisions. ← Back to the encyclopedia