Swallowtail Angelfish – Pair | Tank | Care | Reef Safe | Male | Masked

Swallowtail Angelfish

Something that’s distinctive about this Swallowtail Angelfish is that it’ll normally go away coral alone, making them appropriate for reef tanks. This Swallowtail Angelfish species can stand up to 7 inches long and prefers a lot of swimming space, so you will have to get a bigger tank, not less than 125 gallons, to accommodate this fish. In this article, I am going to talk about Swallowtail Angelfish pair, male, tank size, care, reef safe, zebra, masked, etc.

Swallowtail Angelfish profile

The Masked Swallowtail Angelfish is often known as the Japanese Angelfish and resides within the northwest Pacific Ocean from southern Japan to the Philippines.

They inhabit rocky reefs and are sometimes seen in small teams or harems consisting of 1 male and a number of other females. Masked Swallowtail Angelfish, like others of the genus (Genicanthus) exhibit dramatic sexual dimorphism the place females differ in coloration from males.

Females have a cream to white coloration chest, which steadily adjustments to yellow alongside the top of the dorsal, with a dramatic black band over the attention and on the base and alongside the caudal fin.

Males have a brilliant yellow-orange face that continues horizontally down the facet of the fish, with slim black vertical bars operating the size of the fish to the caudal peduncle.

A well-established 125-gallon aquarium or bigger will present sufficient swimming houses to accommodate this species, with plenty of hiding locations. An exception to most angelfish, the Masked Swallowtail Angelfish will make an excellent reef dweller, and won’t nip at stony and smooth corals (sessile invertebrates).

The food plan of the Masked Swallowtail Angelfish ought to embody meaty meals with supplemental algae within the type of high-quality angelfish preparations, enriched mysis shrimp, and enriched brine shrimp.

Swallowtail Angelfish Distribution

This species is discovered around Fiji, Indonesia, and Vanuatu. This species inhabits reasonable to deep waters on steep slopes. A single male is normally seen with a number of females.

Swallowtail Angelfish Description

This species is sexually dimorphic (women and men have totally different colors).

Japanese swallowtail angelfish have a white and yellowish-dusky brown higher body, with decrease body turning into white. A vertical white stripe is in front of the pectoral fins. Black markings are discovered behind and above the eyes, with black space on the entrance of the gill cowl.

The base of the caudal fin and caudal lobes are black. Males of this species have a white stomach, with an excellent yellowish-orange mask that tapers horizontally down the body, dividing the striped higher back from the non-striped decrease entrance Light orange spots may be seen on the caudal and dorsal fins. Considered by many to be probably the most colorful member of the Genicanthus genus.

As in different members of the genus, this fish reveals an excessive degree of sexual dimorphism. Both female and male swallowtail angels are exceptionally engaging.

Females have a metallic child blue base coloration that’s richest within the face and fades steadily in direction of the hind. Skinny, brilliant blue strains run alongside the margins of her dorsal and anal fin.

A vivid yellow sheen fills in the remainder of the dorsal fin, fading like a golden mist into her midsection. The top and backside of her white tail are closely edged in black. Males share the blue background and edging; and, that’s just about the place the similarities of coloration finish.

An orange line fringes the blue edging of the dorsal and anal fins, breaking into extensively dispersed spots before reaching his body. Dark, skinny, vertical bands run throughout your entire flank and brow.

The edging on his tail is way fainter than the feminine’s, fading to silvery gray in-between and bearing orange speckles that emerge from the bands over the caudal area. Long, silvery filaments prolong from the information of his tail fin.

Swallowtail Angelfish Colors and Markings

This fish can also be known as a blackspot angelfish due to the black spot situated on the male’s breast. The feminine is yellow dorsally and lights blue ventrally.

The caudal fin is marine blue highlighted by a darkish, blue-black edging on the top and backside. The male is marked with a sequence of vertical purple stripes protecting your entire pale-colored body. The tail of the male is forked and is yellow with blue edges.

Beyond its crescent-shaped caudal fin, just a few different notable traits are discovered all through this species. They have small mouths lined with three or 4 rows of the small bristle-like tooth, typically with suggestions that have three factors.

Their tooth is shorter than the remainder of the members of the Pomacanthidae family, clearly a mirrored image of their feeding ways of selecting prey out of the water column versus eradicating algae from the encrusting rubble.

Swallowtail Angelfish Tankmates

Matching swallowtails with potential tank mates is a space requiring more concern and energy than does their food plan. Swallowtails won’t overtly assault the overwhelming majority of fish, as they’re relatively peaceable themselves, however, it might chase after small peaceable planktivores or get harassed by different planktivores.

Be cautious to not combine swallowtail angels with fish which can be outwardly more aggressive. They can, and most definitely can be dominated by bigger aggressors.

Such aggressive fish would come with triggerfish, large angelfish, and most surgeonfish. Likewise, thought must be given prior to introducing any further planktivores, like Anthias species, with the swallowtails.

Males will struggle with males from its species, different Genicanthus genus males, and people fish that have comparable coloration. It may be greatest to maintain this fish alone, as a mated pair, or you possibly can preserve a small group of females with one male in a bigger aquarium.

Typically, it ignores different fish species together with non-related angelfish. Possible tankmates embody clownfish, blennies, gobies, chromis, butterflyfish, small lionfish, and eels.

Swallowtail Angelfish Captive Care

At around seven inches size upon reaching full measurement, the swallowtail angel is definitely a bit smaller than the typical angelfish. Still, given its exercise degree, it requires a bit more swimming house.

Thus, an aquarium quantity of 125 gallons or more is really useful (some recommend offering an excellent bigger tank). Open aquascapes are preferable to aquascapes which can be crammed to the brim with a rock. A full lid must be in place to stop deadly jumps.

This fish isn’t a particularly finicky eater. Its major fare must be meaty. Larger items of prawn, mussel, and many others. must be chopped all the way down to a manageable chew measurement.

Fully adjusted specimens will probably settle for flakes and small pellets. That being mentioned, the swallowtail angel is a zooplanktivore that can vary a lot get pleasure from, and profit from the inclusion of stay zooplankton in its food plan.

Swallowtail angels seldom current compatibility points. They (together with the opposite genicanthids) are simply probably the most reef-safe among the many angelfishes, very hardly ever if ever taking a nip at a coral, clam, and many others.

They typically get alongside fairly nicely with different fish. They might not, nonetheless, get together with their very own sort. This is very so with males. In many instances, a single male may be efficiently maintained with a single feminine or small harem.

Swallowtail Angelfish

Small teams of females will also be stored, although some aggressive contests might happen. There is a relatively attention-grabbing motive for this.

In the absence of a male, a dominant feminine will rework right into a male. This means full coloration change and all. The change is irreversible. This may be an exciting improvement for a monetarily minded aquarist, being as the acquisition value of males exceeds that of females by an element of 2-3x.

With a lifespan of 10-15 years, the beautiful Swallowtail Angel can present its keeper with an infinite quantity of satisfaction.

Provide areas of sturdy water motion within the tank in the course of the day. Use pumps on timers that may be turned off after eight to 10 hours. Well-oxygenated water is perfect. Lids are crucial as this fish might try to leap out of open aquariums.


The Genicanthus semifasciatus is a protogynous hermaphrodite (born feminine and sooner or later in its life, adjustments intercourse to male). Permanent harem teams are fashioned, composed of a single male and a number of other smaller females.

Swallowtail Angelfish Diet

Naturally, a planktivore, is an angelfish that usually dines on diatom and filamentous algae in aquariums. It must be fed a diverse food plan of meaty fares and marine algae-based meals, resembling finely chopped recent shrimp and frozen silversides, frozen brine and mysis shrimp, angelfish preparations, dried seaweed (nori), enriched flakes, or pellets containing spirulina.

This fish will gulp meals from the water’s floor, which makes it swallow air at a similar time. It isn’t uncommon for the fish to turn out to be bloated, ensuing within the fish showing to be struggling whereas swimming head down, however, don’t be concerned. The fish eliminates this trapped air by expelling bubbles from its mouth and anus. In different phrases, it burps and farts.

Sexual Differences

This is one of some angelfishes that may simply be recognized by intercourse as male or feminine, due to their variations in look. Males have a significantly totally different coloration or sample than females.

The male is marked with skinny, darkish vertical bands that cowl the body from the pinnacle to the place the dorsal and anal fins finish, adopted by a yellow-banded space on the base of the tail, and thus named a zebra angelfish.

This species of fish is called a protogynous hermaphrodite, which implies this fish will undertake the male coloration and turn out to be male-only after first dwelling as a useful feminine for a time period.

When the chance arises, most frequently from the dearth of a dominant male’s presence, the dominant feminine of the native group will turn out to be male. Swallowtails reportedly take as much as 30 days to finish this intercourse change.

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Swallowtail Angelfish Reproduction

The male ‘performs’ to get the eye of the females. He rolls onto his facet or back in entrance of the females; or positions himself instantly in entrance of them and quivers his caudal fin.

He then positions himself alongside the feminine and he or she extends all of her fins. After just a few seconds of the male nuzzling his head close to the rear of the feminine, the pair separates, roll onto their sides and launch their eggs and sperm into the water the place exterior fertilization happens. The eggs and larvae are pelagic.

While positioned alongside the feminine, the male’s whole body will vibrate or quiver excitedly. The feminine will then prolong all of her fins as an indication of encouragement.

After just a few seconds of the male nuzzling his head close to the rear of the feminine, the pair separated by only some inches, roll onto their sides and launch their eggs and sperm. Learn more about anglerfish adaptation.

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