Blue-Green Chromis | Chromis viridis

The Blue Green Chromis (Chromis viridis), also known as the Blue Green Reef Chromis, is a peaceful and active reef fish recognized for its beautiful iridescent blue-green coloration and graceful swimming behavior. Native to the Indo-Pacific, this hardy species is commonly found swimming above branching corals in loose groups. Its shimmering coloration, active personality, and generally peaceful temperament make it a popular addition to both beginner and established marine aquariums.

Care Level: Easy
Maximum Size: 4 inches
Minimum Tank Size: 20 gallons (larger tanks recommended for groups)
Temperament: Peaceful / Occasionally Territorial
Reef Safe: Yes
Diet: Omnivore / Planktivore
Temperature: 74–80°F
Specific Gravity: 1.020–1.026
pH: 8.0–8.4

Blue Green Chromis thrive in established marine aquariums with plenty of open swimming space, live rock, and sheltered areas where they can retreat when necessary. Although commonly maintained in groups, individuals may establish dominance hierarchies and occasionally harass weaker members, particularly in smaller aquariums. Larger aquariums with ample swimming space and hiding areas are recommended for keeping multiple specimens. Feed a varied diet of high-quality marine pellets, flakes, mysis shrimp, enriched brine shrimp, and other appropriately sized frozen or prepared foods. Multiple small feedings throughout the day can help support their naturally active feeding behavior. Their brilliant coloration, hardy nature, and constant activity make Blue Green Chromis an excellent addition to peaceful reef and fish-only aquariums.