Zebra Lyretail Angelfish - Female - Genicanthus caudovittatus
Zebra Lyretail Angelfish - Female - 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 Female Zebra Lyretail Angelfish (Genicanthus caudovittatus), also known as the Zebra Angelfish or Red Sea Swallowtail Angelfish, is an elegant marine aquarium fish with understated yet distinctive coloration. Females have a soft lavender-gray to silvery body accented by a dark marking above the eye and bold black bands along the upper and lower margins of the deeply forked caudal fin. This graceful swallowtail profile contrasts sharply with the vertically striped coloration of mature males, making the species strongly sexually dimorphic.
Native to the western Indian Ocean, G. caudovittatus ranges from the Red Sea south along East Africa to South Africa and also occurs around Madagascar, Réunion, Mauritius, and the Maldives. It inhabits reef slopes from shallow Red Sea habitats to deeper reef environments elsewhere in its range. In nature, these angelfish swim above the reef feeding on suspended plankton, and a single male is commonly associated with several females. Adults reach approximately 8 inches in total length.
Unlike many large marine angelfish that graze directly on sponges, corals, and other sessile organisms, the Zebra Lyretail Angelfish is primarily a planktivore. This feeding strategy, combined with its comparatively peaceful temperament, makes it one of the more dependable full-size angelfish choices for a reef aquarium.
Quick Care Guide
Care Level: Moderate
Minimum Tank Size: 125 gallons
Temperament: Peaceful
Diet: Planktivore
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 open-water feeding 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 together with substantial rockwork for shelter. Zebra Lyretail Angelfish spend considerable time swimming above the reef rather than remaining tightly associated with rock surfaces, so long, unobstructed swimming lanes are especially important.
Arrange rockwork to create caves, overhangs, cracks, and shaded retreat areas without overcrowding the aquarium. Newly introduced specimens may initially remain close to shelter before becoming more confident in open water. Moderate to strong circulation, good oxygenation, efficient filtration, and stable water quality are appropriate for this active planktivorous angelfish.
No specialized substrate is required, so either sand or a conventional reef substrate is suitable. Additional aquarium space is beneficial when keeping a pair or harem rather than a single female.
Diet and Feeding
The Female Zebra Lyretail Angelfish is primarily a planktivore. Wild fish feed on planktonic organisms several meters above the reef, so captive feeding should emphasize appropriately sized foods that remain suspended in the water column long enough for natural feeding behavior.
Offer a varied diet including mysis shrimp, enriched brine shrimp, copepods, finely chopped krill or marine seafood, frozen plankton blends, and quality marine pellets or flakes. Angelfish preparations and foods containing Spirulina or other marine algae can also be incorporated for additional nutritional variety.
Feed two to three smaller meals daily when practical. Frequent feeding is particularly useful during acclimation and more closely reflects the species' natural habit of taking small food items throughout the day.
Temperament and Tankmates
The Female Zebra Lyretail Angelfish is generally peaceful and considerably less territorial than many large Pomacanthus or Apolemichthys angelfish. It is well suited to community aquariums containing tangs, peaceful wrasses, anthias, clownfish, cardinalfish, gobies, and other appropriately sized marine fish.
In nature, one male is commonly found with several females, and this social structure can also be replicated in sufficiently large aquariums. Compatible pairs or harems are possible, with simultaneous introductions helping reduce territorial disputes. Multiple females can generally be maintained together more readily than multiple mature males.
Avoid excessively aggressive tankmates that may continually chase the angelfish or prevent it from feeding in open water. Very boisterous fish can be especially problematic during the initial acclimation period.
Reef Compatibility
The Zebra Lyretail Angelfish is reef safe and is one of the stronger choices among full-size marine angelfish for a coral aquarium. Its natural feeding behavior is centered on plankton in the water column rather than grazing directly on coral tissue, sponges, or other sessile reef organisms.
It is generally suitable for aquariums containing SPS corals, LPS corals, soft corals, zoanthids, clams, ornamental shrimp, crabs, snails, and other common reef inhabitants. As with any aquarium fish, individual behavior can vary, but persistent coral predation is not characteristic of Genicanthus caudovittatus.
Water Parameters
Temperature: 72–78°F
Specific Gravity: 1.024–1.026
pH: 8.1–8.4
Alkalinity: 8–12 dKH
Published aquarium husbandry guidance supports temperatures in the low-to-upper 70s for this species. Maintain strong oxygenation and consistent temperature, salinity, and pH; stable conditions are more important than continually adjusting the aquarium to reach a single exact number.
Common Considerations
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Active open-water swimmer: Adults reach approximately 8 inches and require substantial horizontal swimming room despite their relatively streamlined body shape.
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Excellent reef compatibility: Its plankton-feeding lifestyle makes it considerably safer around corals and sessile invertebrates than most large marine angelfish.
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Frequent feeding is beneficial: Two to three smaller meals daily better match its natural planktivorous feeding strategy.
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Suitable for social groupings: Females can be maintained with a compatible male or as part of a harem in a sufficiently large aquarium; multiple mature males should be avoided.
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Handle carefully: Like other marine angelfish, this species has cheek spines that can become tangled in aquarium nets, so careful capture and handling are recommended.
