Blueline Grouper (Cephalopholis formosa)
Reef Compatible – With Caution
Care Level – Intermediate
Disposition – Aggressive
Min. Tank Size – 75 gallons
Mature Size – 11 inches
Specifications
| Feature | Detail |
|---|---|
| Species | Cephalopholis formosa |
| Size Range | 3″ to 4″ (when young) |
| Adult Size | Up to 11 inches |
| Compatibility | Reef compatible with caution |
| Behavior | Aggressive |
| Minimum Tank Size | 75 gallons |
FAQ
Is the Blueline Grouper suitable for a reef tank?
Yes, but with caution. It can coexist with reef inhabitants, though it may attack or damage delicate corals and invertebrates. Monitor closely and provide ample space and hiding spots.
What is the expected growth rate of this fish?
The Blueline Grouper grows slowly at first, reaching 3″ to 4″ in early stages. It can mature to 11 inches over several years under proper conditions.
Is this fish aggressive toward other fish?
Yes, it is known to be aggressive, especially toward smaller or slower-moving fish. It may dominate or attack conspecifics and other species in the tank.
Alexandra Langdon –
I bought this Blueline Grouper for my 75-gallon reef tank. It’s been two months and it’s active but not overly aggressive. I’ve added plenty of rock structures and it seems to feel secure. Still watchful of smaller fish, so I’ve removed a few sensitive invertebrates. Overall, it’s a good fit for a larger tank with proper setup.
Lily Thomson –
The fish arrived healthy and was about 3.5 inches. It’s been a few weeks and it’s showing signs of territorial behavior. I’ve placed it in a corner with a lot of hiding places. I’m cautious about adding new fish to avoid conflict.
Faith Ferguson –
This grouper has become a centerpiece in my tank. It’s not aggressive toward larger fish, but it does chase smaller ones. I’ve maintained a large tank with plenty of live rock and it’s adapted well. The size is manageable and it looks impressive.