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Lori's Anthias
Pseudanthias lori
A stunning, delicate deep-reef anthias originating from the Indo-Pacific, featuring a beautiful magenta body with prominent red dorsal bars.
Water Temperature
22 - 26 °C
pH Value
8.1 - 8.4
Water type
Marine
Tank level
Bottom and middle
Adult size
12 cm
Minimum tank volume
>= 300 L
Minimum group
>= 4
KH
8 - 12 dKH
Species description
Geographical Origin and Habitat: Pseudanthias lori is native to the tropical waters of the central-western Indo-Pacific, ranging from Christmas Island in the eastern Indian Ocean to the islands of French Polynesia, extending north to Japan's Ryukyu Islands and south to the Great Barrier Reef of Australia. It is a deep-water reef species, typically inhabiting outer reef slopes, drop-offs, and current-swept walls at depths between 25 and 70 meters.
Taxonomy and Morphology: This species belongs to the family Serranidae and subfamily Anthiadinae. It features a slender, elongated, and laterally compressed body with a large, terminal mouth adapted for capturing zooplankton from the current. The caudal fin is deeply forked with pointed lobes. It reaches a modest maximum length of 7 to 8 cm, making it one of the smaller and more graceful anthias species.
Social Behavior: It is a gregarious shoaling fish that forms large aggregations of hundreds of individuals in the wild, hovering above coral formations to feed on drifting plankton. Within these shoals, they maintain a strict haremic social structure, where a single dominant male controls a group of females. In captivity, they must be kept in groups of at least 5 to 6 individuals to prevent stress.
Coloration and Sexual Dimorphism: The coloration of Lori's Anthias is magnificent: a pale pink to magenta-lavender body, marked with 6 to 8 bright red-orange vertical bars or blotches along the upper back, concentrated near the caudal peduncle. Sexual dimorphism is prominent: males exhibit longer dorsal and pelvic fins, brighter coloration (especially during courtship), and grow slightly larger than females.
Care, breeding and tankmates
Aquarium Setup: Requires a marine aquarium of at least 300 liters to house a small group. Because they originate from deep reefs, the aquarium lighting should be kept moderate or diffused, with plenty of overhangs and caves to provide shaded retreats. Strong water movement via well-placed powerheads is essential to simulate the constant currents of their natural habitat.
Diet and Feeding: They are demanding planktivores. Due to their rapid metabolism, they must be fed small amounts multiple times a day (at least 3 to 4 times). The diet should include high-quality frozen copepods, rotifers, mysis, vitamin-enriched brine shrimp, and small, high-quality dry pellets. Spawning foods or live foods may be required to stimulate feeding during acclimation.
Water Quality: Requires pristine, highly oxygenated, and stable water conditions. Maintain temperature between 23°C and 26°C (preferring slightly cooler water than shallow anthias), pH of 8.1 to 8.4, and salinity between 1.023 and 1.025. Efficient protein skimming and regular water changes are required to keep nitrates and phosphates near zero.
Compatibility and Cohabitation: Entirely peaceful and reef-safe. It does not harm corals or sessile invertebrates. Suitable tankmates include peaceful, non-aggressive species like gobies, firefish, and gentle wrasses. Avoid housing with large, hyperactive, or aggressive fish (such as large tangs or triggerfish) that may intimidate the anthias and prevent them from feeding.
Aquarium Breeding: Breeding in home aquariums is not documented. They are protogynous hermaphrodites, meaning all individuals are born female, and the dominant female in a group will transition into a male if the resident male is lost. This transition is controlled by social structure and hormone regulation within the harem.
Risks and Diseases: The primary risk is starvation and muscle wasting due to inadequate feeding frequency. They are also sensitive to transport stress and susceptible to common marine parasites like Cryptocaryon. A peaceful quarantine period with frequent feeding and minimal disturbance is highly recommended before introduction to the main display.
Geographic Origin and Distribution
Pseudanthias lori is native to the tropical waters of the central-western Indo-Pacific, ranging from Christmas Island in the eastern Indian Ocean to the islands of French Polynesia, extending north to Japan's Ryukyu Islands and south to the Great Barrier Reef of Australia. It is a deep-water reef species, typically inhabiting outer reef slopes, drop-offs, and current-swept walls at depths between 25 and 70 meters.
Origin
Tropical oceans and reefsSouth and Southeast AsiaEast AsiaAustralia, New Guinea, and Oceania
Fish profile
- Temperament
- Aggressive
- The temperament of Pseudanthias lori is generally peaceful towards completely unrelated fish, making them wonderful community residents. However, they establish a strict pecking order within their own group, which can involve some chasing and posturing. The dominant male will frequently display to the females to maintain his status and keep the harem in line. While usually harmless, this internal squabbling requires adequate space and hiding spots for subordinate individuals. They should not be housed with overly aggressive predators that might bully or consume them.
- Diet
- Carnivore
- In the wild, Pseudanthias lori is a dedicated zooplanktivore that constantly picks tiny organisms from the water column. In the home aquarium, they require a varied diet consisting of high-quality frozen or live meaty foods. Suitable options include mysis shrimp, enriched brine shrimp, copepods, and finely chopped seafood. Getting them to accept dry prepared foods like high-quality flakes or small pellets can take time and patience. A diverse nutritional profile is crucial for maintaining their vibrant coloration and immune health.
- Life expectancy
- 2-5 years
- Under optimal care, Lori's Anthias has a captive lifespan of approximately 2 to 5 years. They are delicate and require very stable water parameters and high-quality nutrition to thrive long-term. Stress is a major factor that can reduce their lifespan, so keeping them with peaceful tankmates is essential. Proper acclimation and providing shaded overhangs to mimic their deep-water habitat also promote longevity.
- Adult size
- 12 cm
- The catalog's scalar value is 12 cm. The FishBase SPECIES table (v25.04 snapshot) source reports a maximum adult measurement of 12 cm for this species, recorded as total length (TL). The taxonomic link follows a synonym to the FishBase SPECIES table (v25.04 snapshot) record for Pyronotanthias lori (v25.04); male or unsexed record. These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
- Sex ratio
- Harem
- This species exhibits a fascinating social structure characterized by protogynous hermaphroditism, where all individuals are born female. A typical group consists of a single dominant male maintaining a harem of several females. If the dominant male is removed or dies, the largest and most dominant female will morph into a male to take his place. For the home aquarium, it is best to purchase a group of females and allow this natural transition to occur. Keeping multiple males usually results in fatal aggression unless the tank is massive.
- Feeding frequency
- 3-4 times daily
- Due to their incredibly active metabolism and natural grazing behavior, Pseudanthias lori requires multiple feedings throughout the day. It is highly recommended to feed them small amounts at least three to four times daily. Infrequent, large feedings are poorly digested and can lead to malnutrition or starvation over time. Automated feeders can be very useful for dispensing small amounts of dry food while the aquarist is away. Consistent, frequent meals are the key to long-term success with this species.
- Bioload
- Pseudanthias lori contributes a moderate amount to the overall bioload of a marine aquarium system. Due to their highly active nature and constant swimming, they require frequent feedings which indirectly increases the organic waste produced. Excellent filtration and regular water changes are strongly recommended to process these nutrients. Maintaining a robust protein skimmer will help manage the dissolved organics effectively. Proper husbandry ensures that the bioload remains manageable over the long term.
- Flow
- Moderate
- This species originates from dynamic reef environments where strong water movement is a constant factor. Pseudanthias lori thrives in aquariums that provide moderate to strong, turbulent water flow across the aquascape. Brisk currents simulate their natural habitat and encourage their natural schooling and feeding behaviors in the water column. Powerheads or wavemakers should be positioned to create broad, sweeping flow patterns rather than harsh, direct streams. Adequate flow also keeps particulate food suspended longer, giving them more time to feed.
- Jump risk
- Yes
- Like many highly active reef fishes, Pseudanthias lori presents a moderate to high risk of jumping out of an open aquarium. They are easily startled by sudden movements, lighting changes, or aggressive tank mates, which can trigger a flight response. It is strongly advised to keep a tight-fitting lid or a custom mesh screen over the tank at all times. Even small gaps around equipment and overflow boxes should be covered to prevent tragic accidents. Taking these precautions is a simple but vital part of their husbandry.
- Reproduction
- Oviparous
- Breeding Pseudanthias lori in a home aquarium is exceptionally rare and presents significant challenges for even advanced hobbyists. They are pelagic spawners that release their eggs and sperm into the water column during synchronized mating rituals. The resulting larvae are microscopic and require highly specialized, perfectly sized live planktonic foods to survive. Furthermore, the larval stage is extremely long and sensitive to minute changes in water quality. Consequently, nearly all specimens available in the trade are wild-caught rather than captive-bred.
- Compatibility & tankmates
- Reef safe
- This species is generally considered completely reef safe and makes a stunning addition to mixed reef aquariums. Pseudanthias lori will typically ignore corals, sessile invertebrates, and most motile invertebrates like ornamental shrimp. They are generally peaceful towards heterospecifics but can display significant aggression towards other Anthias species. It is usually best to keep them as the only Anthias species in the tank unless the aquarium is exceptionally large. Careful observation is needed when introducing new tank mates to ensure harmony.
- Tank level
- Middle/Bottom
- Throughout the day, Pseudanthias lori will predominantly occupy the middle to upper levels of the water column. They are highly visible fish that love to hover above the reef structure, facing into the current to catch passing food. At night or when frightened, they will quickly dart into the rockwork to seek shelter in crevices and caves. Providing plenty of open swimming space alongside complex rock formations is essential for their comfort. Their active presence brings a wonderful sense of movement and life to the upper reef zones.
Scientific Parameters & Models
FishBase
Window to the official scientific data of the species
Data synced on: 06/15/2026
- Trophic level
- 3.4 ± 0.45 se
- Resilience
- High (less than 15 months)
- Phylogenetic uniqueness (PD50)
- 0.502
- Bayesian Length-Weight
- a = 0.01413, b = 3
- VulnerabilityLow vulnerability (10 / 100)
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
Related species
Recommendations grouped by close relatives, companion choices, and similar care.
