Japanese Swallowtail Angelfish - Male (Genicanthus semifasciatus)

Why it is a Collector's Vault fish: Known in Japan as Tosayakko, the Japanese Swallowtail lives in deeper, cooler water off Japan, the Philippines and the Chinese coast, and has been recorded as deep as 650 feet. In the wild one male guards a harem of females, so large, fully colored males are far less common than females. Males are bigger and more intensely patterned, reaching nearly 8 inches.

Quick Facts

• Scientific name: Genicanthus semifasciatus
• Origin: Eastern Asia
• Available sizes: Large male
• Care level: Medium
• Reef safe: Yes
• Temperament: Peaceful
• Max size: 8 inches
• Minimum aquarium: 125 gallons
• Diet: Carnivore (planktivore)
• Water: 68-78°F, pH 8.1-8.4, specific gravity 1.020-1.025

Compatibility

• Good tankmates: Anthias, fairy wrasses, tangs and other peaceful open-water fish; can be kept with 2-4 females
• Avoid: Aggressive fish and fin nippers such as large triggers and puffers

Care Notes

• One of the more reef-friendly angelfish: swallowtail angels feed on plankton and generally leave corals and clams alone
• Adult males suit aquariums of about 125 gallons or larger with open swimming space
• Tolerates cooler water, from the high 60s up to about 78°F
• Feed mysis, copepods and other small meaty foods at least twice a day

How to Buy, Pickup & Shipping

• Conditioned (7-Day Hold): your fish usually reaches us the day after you order. We then hold it for at least 7 days to inspect it, make sure it is eating and check for any sign of disease before it goes home with you. Covered by our Collector's Vault Guarantee.
• Direct - Save 15%: released as soon as it arrives, with no conditioning period. Sold as-is with no live arrival or health guarantee.
• Store pickup in Sugar Land, or $100 flat-rate FedEx Priority Overnight shipping within the continental U.S. (ships Monday through Thursday; weather holds as needed).
• Full terms: Collector's Vault Shipping & Guarantee.