Back to atlas
FishMarineDifficult

Encyclopaedia

Purple Queen Anthias

Pseudanthias tuka

Also known as the Purple Queen Anthias, it is one of the most spectacular marine fish due to its electric purple color, but it is extremely difficult to maintain long-term.

Family
Serranidae
Origin
Indo-Pacifico: diffuso dalle Mauritius fino alle Filippine e alla Grande Barriera Corallina.
Origin
Tropical oceans and reefsExtra-Amazon South AmericaSouth and Southeast Asia
Tank use
Used in 0 tanks

Share

Species challenges
Water Temperature

22 °C - 27 °C

pH Value

8.1 - 8.4

Water type

Marine

Tank level

Mid-water

Adult size

12 cm

Species description

Geographical Origin and Habitat: Western Indo-Pacific: distributed from Mauritius to the Philippines, Indonesia, Palau, Solomon Islands, and the Great Barrier Reef. Inhabits upper outer reef slopes exposed to strong ocean currents at depths of 10 to 30 meters.

Taxonomy and Morphology: Member of the family Serranidae. Compressed body, pointed snout, and highly elongated lyre-shaped caudal fin. Reaches approximately 12 cm.

Social Behavior: Peaceful, highly gregarious, and shy in aquaria. Forms large tight schools swimming in unison near reef branches. Protogynous hermaphrodite.

Coloration and Sexual Dimorphism: Males are electric purple with an oblique yellow stripe on the head and a yellow or orange dorsal fin. Females are brilliant purple with a bright yellow stripe running along the back to the tail tips. Marked dimorphism.

Care, breeding and tankmates

Aquarium Setup: Requires a large, mature tank of at least 400 liters with strong water movement and excellent oxygenation. Plenty of rocky hiding spots are mandatory. Cover is essential. High jumping risk.

Diet and Feeding: Obligate planctivorous carnivore. Requires frequent feeding (4-5 times daily) with live copepods, rotifers, cyclops, and baby frozen brine shrimp. Most specimens reject dry food.

Water Quality: Pristine and stable parameters. Temperature 22-27°C, pH 8.1-8.4, salinity SG 1.020-1.026. GH 15-25. Requires an oversized protein skimmer to handle the organic load from frequent feedings.

Compatibility and Cohabitation: Reef safe. Must be housed only with extremely peaceful fish and kept in groups of at least 6-8 specimens (one male and several females). Active or boisterous tankmates will prevent it from feeding, leading to death.

Aquarium Breeding: Not successfully bred in captivity due to the prolonged planktonic larval stage.

Risks and Diseases: Very high initial mortality rate due to fasting stress. Extremely sensitive to oodinium and external parasitic infections.

Fish profile

Temperament
Pacifico, timido e molto delicato
Diet
Carnivoro zooplanctivoro obbligato (richiede copepodi vivi, cyclops e piccoli crostacei congelati di continuo)
Tank level
Mid-water
Minimum group
6
Adult size
12 cm
Minimum tank volume
400 L
GH
n/a
KH
8 dKH - 12 dKH
TDS
n/a
Conductivity
n/a
Sex ratio
Harem (1 maschio con 5+ femmine)
Feeding frequency
4-5 volte al giorno
Bioload
Medium
Flow
Forte
Jump risk
Covered tank required
Reproduction
Ermafrodita protogino. Nessun report di riproduzione con successo in cattività.
Compatibility & tankmates
Reef safe al 100%. Deve essere associato solo a pesci estremamente tranquilli. I compagni vigorosi lo spaventano a morte.

Ecological Estimates & Biological Models

Trophic level
3.6 ± 0.41 se
Resilience
High (less than 15 months)
Phylogenetic uniqueness (PD50)
0.625
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

Other recommended species with similar care requirements and water parameters.

Last updated: 06/13/2026