- Sku: 3150602
Blue Green Chromis (Chromis viridis)
The Blue Green Chromis (Chromis viridis) is a shimmering, peaceful schooling fish that brings constant movement and a flash of metallic blue-green to any reef. Hardy, active, and inexpensive, it is one of the best starter saltwater fish and looks stunning kept in a group. Build out the rest of the system with our saltwater livestock selection.
Care Guide
- Aquarium: 30 gallons or larger with open water for swimming and live rock for shelter. Chromis are mid-water schoolers and use the whole tank.
- Keep in a group: Best kept in odd-numbered schools of five or more. Larger groups spread out natural pecking-order behavior and keep the school tight and peaceful.
- Water quality: Keep parameters stable. Target 72 to 78°F, pH 8.1 to 8.4, specific gravity 1.020 to 1.025, and dKH 8 to 12.
- Diet: Easy-to-feed omnivore. Offer marine flake, mysis, and brine shrimp 1 to 2 times a day. In the wild they pick zooplankton from the water column.
- Temperament: Peaceful and reef safe. They mix well with most community reef fish and will not bother corals or invertebrates.
Specifications
| Common Name | Blue Green Chromis (Green Chromis) |
| Scientific Name | Chromis viridis |
| Care Level | Beginner |
| Temperament | Peaceful |
| Max Adult Size | Around 3.5 inches (9 cm) |
| Minimum Tank Size | 30 gallons |
| Recommended Group | 5 or more |
| Water Temperature | 72 to 78°F |
| pH | 8.1 to 8.4 |
| Specific Gravity | 1.020 to 1.025 |
| Diet | Omnivore |
| Reef Safe | Yes |
| Origin | Indo-Pacific |
| Availability | In-store pickup only |
Tank Mates & Compatibility
Blue Green Chromis are peaceful and reef safe, making them ideal community fish for almost any saltwater setup. They pair beautifully with other calm reef fish. Good companions we carry include:
Keep them in a group and avoid large or aggressive predators that may see small Chromis as a snack.
Recommended Foods & Supplies
- Ocean Nutrition Brine Shrimp Plus Flake for daily staple feeding
- Freeze-Dried Mysis Shrimp for protein and color
- Browse all marine fish nutrition
FAQ
Are Blue Green Chromis reef safe?
Yes. They are completely reef safe and will not nip corals or bother invertebrates, making them a perfect addition to any reef tank.
How many should I keep together?
Keep them in odd-numbered groups of five or more. Larger schools stay tighter and more peaceful, since aggression is spread across the group rather than focused on one fish.
Are they good for beginners?
Yes. Chromis are among the hardiest, most affordable marine fish and are often used to help mature a new reef tank.
What do they eat?
An easy omnivore diet of marine flake, mysis, and brine shrimp. Feed small amounts 1 to 2 times a day.
Have a question?
Blue Green Chromis (Chromis viridis)
