Chromis viridis

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Common Name
Blue Green Chromis
Binomial Name
Chromis viridis
Chromis viridis 2.jpg
Scientific Classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Pomacentridae
Genus: Chromis
Species: viridis



Common Names

  • Blue Green Chromis
  • Blue Chromis



Characteristics

Description

Small, ovalate and laterally compressed species. Base colouration greenish, with green to blue irredescence, fading to whitish or silvery below. Caudal fin deeply forked and tips may extend into short filaments. Dorsal and anal fins may also extend into short filaments. Fin colouration varies from clear to similar to body colouration. Does not show black spot at pectoral fin base, nor does it have dark margins on dorsal, anal and caudal fins. Scales are relatively large and easily dislodged.

Similar Species

C. atripectoralis has a black spot at the base of the pectoral fin. C. cyaneus has dark margins on dorsal, anal and caudal fins.

Maximum Size

8 cm.

Associated Organisms

Often found schooling above Acropora sp. corals, particularly A. cytherea and other branching and tabular species, where they will take cover if threatened.

Behaviour

Generally peaceful, however will become more aggressive amongst themselves the fewer are kept. Best kept in a group of five or more. This helps distribute aggression evenly, with no lone specimen picked on. They are an active species and will regularly swim the length of the aquarium.



Captive Care

Tank Size

Minimum tank size of at least 200L would allow a small group of five to be kept, as they need to be kept in a group to minimise conspecific aggression. Preferably larger volumes would be better suited to housing larger schools, and would show these fish of better.

Water Flow

No preference in particular, however as most Acroporidae corals require high flows, it is advised to have this kind of flow through the aquarium.

Lighting

No preference in particular, however lighting of a bluer spectrum shows of the blue/green iridescence to greater effect.

Feeding

Not particularly fussy, they will consume most offerings including frozen brine and mysis shrimp, small pellets and flake. In the wild they consume mostly zooplankton.

Growth Rate

Relatively fast growers, they can attain their maximum size within approximately 12-18 months.

Diseases

Usually fairly hardy, they can be susceptable to bacterial infections as the scales are easily dislodged. Also seems to be prone to Vibrio infections.

Other

Smaller regular feeding seems to be beneficial as they have a fast metabolism, similar to many Pseudanthius sp. and most other Chromis spp.



Gallery



Compatibility

Fish

Generally peaceful but prone to bullying from more aggressive fish. Do not keep with aggressive or predatory species such as Lionfish, Triggerfish or Coral Cods/Groupers.

Coral

Reef safe.

Invertebrate

Invertebrate safe.



Reproduction

How it reproduces, how suitable it is to breeding or captive propagation, techniques on how to etc.



Local Ecology

Distribution

Tropical Indo-Pacific: East Africa, south to the Tuamotu Islands, north to the Line Islands [1]

Habitat

Found in lagoons, passages and outer reef slopes. [1]Commonly found in lagoons at less then 12m, forming large aggregations above acropora coral where it take rufuge when threatened.



Additional Information

Some additional notes on it that don't fit in the above sections.



Resources



References

  1. 1.0 1.1 (Allen 1975): Allen, G., Damselfishes of the South Seas, Neptune City: Reigate, 1975.