Species description

Care, breeding and tankmates

Fish profile

Temperament

Peaceful

They possess a highly peaceful temperament, making them ideal for beginners and experts alike. They are quintessential schooling fish that display beautiful, synchronized swimming behaviors. Though generally docile, a small tank can lead to internal bickering.

Diet

Omnivore

They are omnivorous and readily accept a massive variety of aquarium foods. A staple of high-quality marine flakes mixed with frozen mysis and cyclops is ideal. Frequent feedings of small planktonic foods will keep their pastel green color glowing.

Sex ratio

Group

A large group of at least six individuals is recommended to diffuse aggression. As they mature, the dominant individuals may pick on the weakest if the group is too small. An odd number of fish helps maintain a stable, peaceful hierarchy.

Feeding frequency

Twice daily

For optimal health, feed them very small amounts three to four times daily. This constant access to food replicates their wild plankton-picking habits. Infrequent feeding can lead to wasting and heightened aggression within the school.

Bioload

Medium

The Green Chromis is a small fish that introduces a very low bioload individually. When kept in the recommended schools, robust filtration and skimming are necessary. Maintaining excellent water conditions ensures they stay resistant to common diseases.

Flow

Strong

They deeply appreciate strong, varied flow across the top of the aquarium. High flow environments stimulate their natural schooling instincts and keep them active. A well-circulated tank also ensures higher oxygenation, which they require.

Jump risk

No

Reproduction

Oviparous

They are demersal spawners that occasionally breed on the aquarium glass or rocks. The male turns a yellowish color and vigorously fans the eggs to prevent fungus. Rearing the fry requires green water and rotifers, making it a very difficult task.

Compatibility & tankmates

Territorial

They are notoriously peaceful and completely reef-safe for any coral setup. They act as excellent dither fish, helping shyer tank mates feel secure. Do not house them with large predators like lionfish or triggers.

Tank level

All levels

Green Chromis spend the vast majority of their time in the upper water column. They enthusiastically swim against the current in the open spaces above the reef. During the night, they dive deep into the rockwork to sleep securely.