Cephalopholis formosa
Reef Compatible – With Caution
Care Level – Intermediate
Disposition – Aggressive
Min. Tank Size – 75 gallons
Mature Size – 11 inches
| Specification | Detail |
|---|---|
| Size | XXL / 6 inches and above |
| Species | Blueline Grouper |
| Origin | Indo-Pacific |
| Compatibility | Reef compatible with caution |
FAQ
Is the Blueline Grouper suitable for a reef tank?
Yes, but with caution. It can coexist with reef fish only if the tank is well-maintained and other fish are not overly sensitive to aggression.
What is the minimum tank size required for this fish?
A minimum tank size of 75 gallons is recommended to ensure adequate space and stability.
How big does the Blueline Grouper grow?
It can reach a mature size of 11 inches under proper care conditions.

Megan Chapman –
The Blueline Grouper arrived healthy and active. We have a 75-gallon tank and it’s been adjusting well. It’s aggressive toward smaller fish, so we’ve removed some delicate species. Overall, it’s a striking addition to the tank.
Jan Dyer –
Great purchase. The fish is vibrant and stays active. We monitor its behavior closely and have kept it in a well-planted tank with plenty of hiding spots. It’s not the easiest to maintain, but it’s worth it for the visual impact.
Olivia Newman –
It’s aggressive and not suited for a mixed reef setup. We had to reorganize our tank layout to avoid conflicts. Still, it’s a bold and colorful fish that adds character.