Flagfin Angelfish (Apolemichthys Trimaculatus)
Reef compatible with caution. Care level: Intermediate. Disposition: Semi-aggressive. Minimum tank size: 75 gallons. Mature size: 10 inches.
Specifications
| Feature | Detail |
|---|---|
| Species | Apolemichthys Trimaculatus |
| Reef Compatibility | With caution |
| Care Level | Intermediate |
| Disposition | Semi-aggressive |
| Minimum Tank Size | 75 gallons |
| Mature Size | 10 inches |
FAQ
Is the Flagfin Angelfish safe to keep with other fish in a reef tank?
It can be kept in a reef tank with caution, as it may attack smaller or slower-moving fish. Ensure there are no small invertebrates or fish that are too vulnerable.
What is the expected growth size of this angelfish?
The mature size of the Flagfin Angelfish is 10 inches. It grows to this size over time, so a large tank is essential for proper development.
How aggressive is the Flagfin Angelfish?
The angelfish is semi-aggressive, especially when defending territory or during feeding. It may display aggression toward similar-sized fish or those that approach its space.



Gavin Ellison –
I’ve had this angelfish for six months in a 75-gallon tank. It’s active and colorful, though it does chase smaller fish occasionally. I’ve added larger fish to avoid conflicts. Overall, it’s a striking addition to the tank.
Wanda Lambert –
The fish looks beautiful and stays calm most of the time. I noticed it becomes more active during feeding. I keep a close eye on tankmates to prevent any incidents.
Stephen Payne –
It’s not the most peaceful fish, and I had to adjust my tank setup to avoid aggression. Still, it’s a unique and visually appealing species.