Two-colored chromis
The two-colored chromis, sometimes called the half-and-half chromis, is a small marine damselfish of the family Pomacentridae, native to the Indian Ocean and Red Sea. It has a striking body that is dark on the front half and bright white toward the rear, creating a clean two-tone appearance. It is a planktivore that gathers in shoals above coral reefs, feeding on zooplankton drifting in the current. Its schooling behavior and constant open-water swimming make it an active display fish. It is hardy and reef-safe, well suited to beginners, and is best kept in a group to bring out natural shoaling behavior and reduce squabbling. It accepts most frozen and prepared foods and benefits from moderate flow and open swimming space above the rockwork. It is generally peaceful, though some intraspecific chasing occurs as a pecking order forms.
Water parameters
| Temperature | 24 – 27 °C |
|---|---|
| pH | 8.1 – 8.4 |
| Carbonate hardness (KH) | 8 – 12 °dKH |
| Salinity | 33 – 35 SG |
Tank & stocking
| Minimum tank volume | 150 L |
|---|---|
| Volume budget per individual | 20 L — adds up with tank-mates |
| Minimum group size | 3 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 Two-colored chromis need?
Provide at least 150 litres for a small group to keep Two-colored chromis in good conditions.
What water parameters does Two-colored chromis need?
A temperature of 24–27 °C, pH 8.1–8.4, saltwater.
Is Two-colored chromis peaceful or aggressive?
Its temperament is peaceful.
What does Two-colored chromis eat?
Its diet: planktivore.
How many Two-colored chromis should be kept together?
It is a social species: keep a group of at least 3.
How big does Two-colored chromis get?
Around 8 cm as an adult.
Is Two-colored chromis suitable for beginners?
Care level: beginner.
Planning a tank with Two-colored 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.
Fish from the same biotope
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