Description
Masked Swallowtail Angelfish – Genicanthus semifasciatus
Overview:
The Masked Swallowtail Angelfish is a striking reef-safe species, with males showcasing bold black vertical bars across a silvery body and females displaying a golden-yellow hue with a dark eye mask. Active, peaceful, and hardy, this angelfish is an excellent choice for reef and community setups.
Origin:
Native to the Western Pacific Ocean, particularly around Japan, Taiwan, and the Philippines.
Feeding:
Omnivorous — thrives on a diet of high-quality marine pellets, spirulina, mysis shrimp, brine shrimp, and chopped seafood, with frequent algae-based foods.
Tank Mates:
Ideal for reef and peaceful community aquariums, coexisting well with tangs, wrasses, clownfish, gobies, and other non-aggressive fish.
Aggression:
Peaceful, can be kept singly, as pairs, or in harems in larger tanks.
Experience Level:
Best suited for intermediate aquarists, as they require stable, high-quality water conditions.
Water Parameters:
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Temperature: 72–78°F (22–26°C)
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pH: 8.1–8.4
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Salinity: 1.020–1.025
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Minimum Tank Size: 125+ gallons
Graceful, reef-safe, and community-friendly, the Masked Swallowtail Angelfish is a standout addition to large marine aquariums.




