The blue-green chromis is Chromis viridis, a marine damselfish associated with Indo-Pacific reef environments. It is not the scarlet jewel fish sometimes confused with it in older or mismatched listings. This profile focuses on accurate identification and natural context, so readers can start their research with the right species.
At a glance
- Scientific name: Chromis viridis
- Common name: Blue-green chromis or blue-green damselfish
- Environment: Marine and reef-associated
- Reported distribution: Indo-Pacific
- Reported depth range: 1 to 20 metres
- Maximum recorded total length: 10 centimetres
A reef fish, not a generic “jewel” fish
Chromis viridis is described by FishBase as a pale green to light-blue damselfish. Adults can occur in aggregations above branching Acropora coral thickets on sheltered reef flats and lagoons, while juveniles may associate with individual coral heads. Those details give the species an ecological setting that a colour-based common name cannot communicate.
The scarlet jewel fish label points readers in a very different direction. When a listing combines a red freshwater description with Chromis viridis, the conflict is not a small wording issue: it signals that the identification or description needs to be checked before the information is used. Correcting the name protects the rest of the research journey from starting on the wrong path.
How to use the natural-history details
Marine, reef-associated, Indo-Pacific, and depth-range information are reference facts. They can help a reader distinguish this fish from similarly named species and understand why reliable sources discuss coral habitat and open-water aggregations. They are not a complete home-aquarium plan, and they should not be stretched into a treatment, feeding, or water-parameter prescription.
FishBase also records a phytoplankton-feeding association and notes reproductive behaviour connected with nesting. Those facts are useful for understanding the species in context, but a responsible keeper or buyer should use current species-specific resources for any practical decision. A summary record cannot account for an individual fish’s origin, health, social setting, or the condition of a particular system.
Research before relying on a listing
- Look for the scientific name Chromis viridis alongside the common name.
- Confirm that the source consistently describes a marine, reef-associated damselfish.
- Check whether photos, colour descriptions, and habitat notes agree with the named fish.
- Use a current species record to resolve conflicts instead of blending facts from several similarly named fish.
- For health or welfare concerns, seek help from a qualified aquatic-animal professional rather than self-diagnosing from an online profile.
What this profile does not promise
This is not a stocking guide or a substitute for current specialist care information. We have intentionally avoided turning basic biology into universal advice about equipment, compatibility, water conditions, feeding, or disease. Precise identification is the useful first step; a well-supported, species-specific source should guide the next one.
Images deserve the same care as names. Colour can shift with lighting, editing, life stage, and the health of a coral environment, so a photograph should support an identification rather than carry it alone. The most reliable page pairs an image with an accurate scientific name, a consistent habitat description, and a source readers can inspect for themselves.
Reference: FishBase — Chromis viridis.