Zebra Lyretail Angelfish - Male - Maldives - Genicanthus caudovittatus
Zebra Lyretail Angelfish - Male - Maldives - Genicanthus caudovittatus
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FAQs Answers to the most common questions.
How do I tell a true Zebra Lyretail Angelfish from other lyretail or zebra-patterned angelfish, and what should I look for when buying one?
A true Zebra Lyretail Angelfish usually refers to a lyretail veil variant of the freshwater angelfish Pterophyllum scalare with a strong striped “zebra” pattern and extended fin rays. Look for a tall, fully developed body, clean straight dorsal and anal fin margins, and a lyretail caudal fin that is symmetrical rather than pinched or bent. The “zebra” pattern should show distinct vertical bars rather than blotchy stress barring, and the fish should be alert, swimming upright, and not clamping fins. Avoid specimens with cloudy eyes, frayed fins, sunken bellies, or bent spines, because these are common signs of poor stocking, injury, or inbreeding.
What tank size and shape is best for a Zebra Lyretail Angelfish, and why do they seem to do poorly in short tanks?
They do best in a tall tank, not just a large one. Because angelfish are vertically built fish with long fins, a tank with at least 18 inches of height is ideal, and a 29-gallon or larger tank is a much better starting point for a pair or small group. Short tanks can lead to damaged fins, cramped swimming posture, and poor growth of the long dorsal, anal, and caudal filaments that define the lyretail form. They appreciate open swimming space in the middle and upper water column, but also need tall plants, driftwood, and vertical decor to feel secure. A tank that is too shallow often produces stressed fish that display poorly and may become more territorial.
What tankmates are safest for Zebra Lyretail Angelfish, especially because of their long fins?
The safest tankmates are peaceful fish that are not fin-nippers and not fast enough to constantly outcompete them for food. Good choices include medium-sized schooling fish like rasboras, larger tetras that do not nip, corydoras, bristlenose plecos, and calm gouramis in properly sized aquariums. Avoid tiger barbs, serpae tetras, many livebearers that can be aggressive in some setups, and highly boisterous cichlids. Also be careful with very tiny fish, since adult angelfish may eventually see them as prey. Because the lyretail fins are delicate, even mild nipping from “community” fish can cause chronic damage and stress.
What water conditions make Zebra Lyretail Angelfish show their best color and fin extension?
They show best in warm, stable, slightly acidic to neutral water. A good target range is about 76–82°F, with a pH around 6.5–7.5 and low to moderate hardness. Stability matters more than chasing exact numbers. Soft, clean water often improves fin health and body shape, and frequent partial water changes help prevent the fin erosion and stress that lyretail strains can be prone to. A well-maintained aquarium with low ammonia and nitrite, low nitrate, and gentle filtration will usually produce the best coloration and the fullest-looking fins.
Why do Zebra Lyretail Angelfish sometimes have torn fins, curved fin rays, or difficulty swimming, and can this be prevented?
Yes, this is often preventable. Lyretail angelfish have more fin surface area than standard angelfish, so they are more vulnerable to tearing on sharp decor, aggressive tankmates, or strong filter intakes. Curved or shortened fin rays can come from poor genetics, growth issues, or injury during transport and breeding. To reduce problems, keep them with peaceful tankmates, avoid jagged rocks or plastic decor, use gentle but adequate filtration, and maintain excellent water quality. Also, don’t overcrowd them, because repeated darting and fin contact in tight spaces can damage the long trailing fin extensions. If fins repeatedly deteriorate, check for bullying first, then water quality, then possible bacterial or fungal infection.
All listed sizes are approximate, not guaranteed, and may vary slightly.
The Male Zebra Lyretail Angelfish (Genicanthus caudovittatus), also known as the Zebra Angelfish or Red Sea Swallowtail Angelfish, is an elegant and highly distinctive marine aquarium fish. Mature males develop a pale blue to silvery body crossed by numerous narrow dark vertical bars, along with a prominent dark band near the base of the dorsal fin. Long extensions on the deeply forked caudal fin add to its graceful appearance and give this species its characteristic lyretail profile. Adults reach approximately 8 inches in total length.
Native to the western Indian Ocean, G. caudovittatus occurs from the Red Sea south along eastern Africa to South Africa, with populations also recorded around Madagascar, Réunion, Mauritius, and the Maldives. It inhabits reef slopes from shallow Red Sea habitat to considerably deeper reefs elsewhere in its range. In nature, males are commonly encountered with several females and feed primarily on plankton suspended above the reef.
Unlike many marine angelfish that graze heavily on sponges and sessile invertebrates, Genicanthus angelfish are open-water planktivores and are among the most dependable large angelfish for a reef aquarium. Their generally peaceful temperament, active swimming behavior, and strong coral compatibility make them equally attractive for spacious reef or peaceful fish-only aquariums.
Quick Care Guide
Care Level: Moderate
Minimum Tank Size: 125 gallons
Temperament: Peaceful
Diet: Planktivore / Omnivore
Reef Safe: Yes
Region: Western Indian Ocean – Red Sea to South Africa, including Madagascar, Réunion, Mauritius, and the Maldives
Scientific Name: Genicanthus caudovittatus
The species reaches approximately 20 cm, or about 8 inches, and its active midwater swimming behavior makes a 125-gallon or larger aquarium appropriate for long-term housing.
Tank Requirements
Provide a mature marine aquarium with generous open swimming space combined with substantial rockwork for shelter. Zebra Lyretail Angelfish spend considerably more time swimming in the water column than many other angelfish, so long, unobstructed swimming lanes are particularly important. Rockwork should still include caves, overhangs, cracks, and shaded retreat areas where the fish can rest or withdraw when startled.
A minimum 125-gallon aquarium is recommended, with additional space especially beneficial when maintaining a pair or harem. Moderate to strong circulation, efficient filtration, and good oxygenation suit this active reef-associated species. No specialized substrate is required, so either sand or a conventional reef substrate is appropriate.
A secure aquarium cover is recommended, particularly during acclimation. Active open-water fish can make sudden upward movements when startled, and eliminating gaps around plumbing and equipment provides additional security.
Diet and Feeding
The Zebra Lyretail Angelfish is primarily a planktivore, naturally feeding on suspended plankton several meters above the reef. Captive feeding should emphasize small foods that can be taken naturally from the water column.
Offer mysis shrimp, enriched brine shrimp, copepods, finely chopped krill and marine seafood, frozen plankton blends, and high-quality marine pellets or flakes. Quality angelfish and algae-based foods can also be included to broaden the nutritional profile.
Feed two to three smaller meals daily when practical. Distributing food into the water column encourages normal feeding behavior and helps ensure this active fish receives adequate nutrition throughout the day. Quality Marine similarly recommends feeding Genicanthus angelfish multiple times daily.
Temperament and Tankmates
The Male Zebra Lyretail Angelfish is generally peaceful toward unrelated marine fish and is considerably less territorial than many large Pomacanthus or Apolemichthys angelfish. It is well suited to community aquariums containing tangs, wrasses, anthias, clownfish, cardinalfish, gobies, and other appropriately sized reef fish.
The species has a natural social structure in which a male may associate with several females. Compatible pairs or harems can therefore be maintained in sufficiently large aquariums, preferably when the fish are introduced together. Genicanthus angelfish are sexually dimorphic, with males and females displaying distinctly different coloration.
Avoid keeping multiple mature males together unless the aquarium is exceptionally large, as competition between males can lead to territorial aggression. Excessively aggressive tankmates should also be avoided because they can prevent this relatively peaceful angelfish from feeding normally.
Reef Compatibility
The Zebra Lyretail Angelfish is reef safe and is one of the better full-size angelfish choices for a coral aquarium. Its natural feeding strategy focuses on plankton in the water column rather than grazing directly on corals, sponges, or other sessile reef organisms.
It is generally suitable with SPS corals, LPS corals, soft corals, zoanthids, clams, ornamental shrimp, crabs, snails, and other common reef invertebrates. Quality Marine classifies Genicanthus angelfish as generally reef safe.
As with virtually any aquarium fish, unusual individual behavior is possible, but persistent coral predation is not characteristic of this species.
Water Parameters
Temperature: 72–78°F
Specific Gravity: 1.024–1.026
pH: 8.1–8.4
Alkalinity: 8–12 dKH
Quality Marine recommends temperatures of approximately 72–78°F for this species. Maintain stable salinity, temperature, and pH with good oxygenation and consistent filtration; stability is more important than continually adjusting the aquarium to reach a single exact number.
Common Considerations
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Active open-water swimmer: Although adults reach about 8 inches, they require substantial horizontal swimming room and should be housed in at least a 125-gallon aquarium.
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Excellent reef compatibility: Its natural plankton-feeding behavior makes it one of the more dependable large angelfish around corals and ornamental invertebrates.
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Feed multiple times daily: Small meals of planktonic and meaty marine foods better match its natural feeding strategy.
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Social structure matters: A male may be maintained with compatible females in a sufficiently large aquarium, while multiple adult males should be approached cautiously.
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Provide both caves and open water: Complex rockwork offers security, but sufficient open swimming space is essential for this active Genicanthus angelfish.
