Female Masked Swallowtail Angelfish (Genicanthus Semifasciatus)
Reef Compatible: Yes
Care Level: Intermediate
Disposition: Peaceful
Min. Tank Size: 100 gallons
Mature Size: 8 inches
The Female Masked Swallowtail Angelfish is a stunning centerpiece for any advanced reef aquarium. Her striking black and white striped pattern, accented with vibrant yellow markings, creates an elegant contrast that commands attention in the water column. This rare beauty exhibits graceful, deliberate movements that showcase her elongated fins—a living work of art.
At XL 4.25 inches, this specimen is an excellent size for establishing herself confidently in a well-established 100-gallon system. She’s reef-safe and peaceful, making her an ideal choice for mixed communities where visual appeal and harmony are valued.
| Specification | Value |
|---|---|
| Species | Genicanthus Semifasciatus |
| Size (approx) | 4.5 inches |
| Gender | Female |
| Origin | Indo-Pacific |
| Compatibility | Reef-safe, peaceful |
FAQ
Is the Female Masked Swallowtail Angelfish suitable for a beginner reef tank?
No, this fish requires an intermediate to advanced level of care and a minimum tank size of 100 gallons. It is not recommended for beginners.
How long does it take for this angelfish to reach maturity?
The Female Masked Swallowtail Angelfish typically reaches a mature size of 8 inches over several years, depending on tank conditions and diet.
Can this fish coexist with other reef inhabitants?
Yes, it is reef-safe and peaceful, making it compatible with many reef species when properly established in a mature system.


Benjamin Bower –
The angelfish arrived healthy and active. Her coloration is vivid and she moves gracefully in the tank. She’s been in my 120-gallon reef for three months and has not shown any aggression. A beautiful addition to the community.
Madeleine Pullman –
She’s a striking fish with excellent patterns. I was cautious about adding her to my tank due to the size requirement, but she’s settled in well. The tank needs to be mature, which I’ve ensured.
Mary Mackay –
The black and white stripes with yellow accents are absolutely stunning. She’s peaceful and doesn’t chase other fish. I’ve had her for six months and she’s thriving in the 100-gallon system.