Care Level: Moderate
Temperament: Peaceful
Reef Compatible: Yes
General Description: The Swallowtail Angelfish, also referred to as the Japanese Swallowtail, Blackspot or Spotbreast Angelfish, has a wide distribution across the Indo-Pacific. The name Zebra Swallowtail Angelfish is in regard specifically to the male’s appearance, as Genicanthus have the distinction among angelfish of being sexually dimorphic. Males have a silvery-gray body with vertical stripes that can appear dark or reddish in coloration, with accents of blue in its face and a lyre caudal (tail) fin. Females are yellow dorsally and silvery-gray ventrally, with bold black edging on the top and bottom of its caudal (tail) fin. Male Swallowtail angelfish look nearly identical to male Zebra Lyretail angelfish (G. caudovittatus), but lack the dark black band and yellow marking within the dorsal fin. Genicanthus are the only true “reef safe” angelfish in the hobby because their diets are predominately made up of zooplankton rather than corals. This angelfish can be kept as a male-female pair, or a male with several females. While females tend to stay smaller, Swallowtail angels can reach a size of approximately 8″.
Diet Requirements: In the wild Genicanthus angelfish are zooplanktivores. While this specific food source can be a challenge to replicate in the home aquarium, Swallowtail angels will accept a wide variety of prepared foods. Offer a varied diet of high quality algae, pellets, flakes, and especially enriched frozen foods such as spirulina brine shrimp, mysis shrimp, calanus and angel specific mixes for best coloration, immune function and optimal health.
Care Requirements: A minimum 125 gallon aquarium with 12+ inch width is ideal for a single, large Swallowtail angel or a smaller pair. The aquarium will need to be upgraded accordingly with more individuals. Genicanthus angelfish are intolerable of nitrite or ammonia spikes. This angelfish enjoys some rock work and crevices to take refuge, but should be provided with ample open swimming space. The Swallowtail angel is rather non-confrontational with most tank-mates, including angelfish in other genera (Pomacanthus, Holocanthus, Centropyge). Compatability with other species within Genicanthus is variable; do not house more than one male in the same aquarium. Swallowtail angels, like all Genicanthus species, are hermaphrodites; the most dominant female over the course of time will likely change into a male. Swallowtail angels have been observed to occasionally chase smaller more docile planktivores such as anthias. Recommended water conditions, 72-78° F, KH 8-12, pH 8.1-8.4, salinity 1.020-1.025.
Purchase Size: Small: 3″ or less; Medium: 3-1/4″ to 4″; Large: 4-1/4″ to 5″
Note: Your item may not look identical to the image provided due to variation within species. Purchase size is approximate.