Japanese Swallowtail Angelfish - Genicanthus personatus
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The Japanese Swallowtail Angelfish (Genicanthus personatus) is a striking saltwater fish, featuring a yellow upper body and white lower body, with the tail accented by a black stripe along the top and bottom edges. This peaceful angelfish adds elegant movement and vibrant color to larger reef aquariums.
Common Name: Japanese Swallowtail Angelfish
Scientific Name: Genicanthus personatus
Family: Pomacanthidae
Size: Up to 8 inches (20 cm)
Temperament: Peaceful
Difficulty: Moderate
Reef Safe: Yes
Native Region: Found in the Western Pacific, particularly around Japan and nearby islands, inhabiting rocky reefs and drop-offs at moderate depths.
Tank Size: Minimum of 100 gallons
Temperature: 74–80°F (23–27°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate/Decor: Provide plenty of live rock for grazing and open swimming areas; ensure a mature tank with stable water conditions.
• Behavior: Peaceful and shy; may pair or form small harems in larger tanks.
• Diet: Omnivorous—feeds on a mix of meaty foods and prepared angelfish diets.
• Tankmates: Compatible with other peaceful reef fish; avoid aggressive or overly territorial species.
• Reef Notes: Reef safe; generally does not harm corals or sessile invertebrates.