The palette surgeonfish (or Paracanthurus hepatus), also commonly known as the blue tang or regal tang, is a fish found throughout the warm tropical waters of the Indo-Pacific region, ranging from East Africa and Japan to Australia and the Great Barrier Reef. It inhabits coral reefs at depths of around 6.6ft to 132ft.
It is recognizable by its royal blue body, black markings and yellow tail.
Adults typically reach about 10in to 12.4in in length and weigh up to 1.32lb.
Palette surgeonfish may live solitarily, in pairs, in small groups or larger loose aggregations depending on the reef environment and food availability.
Enrichments
Food-Based Enrichments
Aquatic Feeder - Flakes
Conservation Topics
Reef Ecosystem Ambience
Diurnal Behavior
Climate Change
Habitat Loss
Poaching and the Exotic Pet Trade
Omnivore Diet
Ray-finned Fish Evolution
Palette Surgeonfish Fact Sheet
Swimming Animals
Underwater Life Talk
Ecological Restoration
Palette Surgeonfish Name Plate
Lifecycle
Palette surgeonfish may live solitarily, in pairs, in small groups or larger loose aggregations depending on the reef environment and food availability.
The palette surgeonfish reproduces through broadcast spawning year-round, with peaks between April and September. Males court females by circling, darting, and nudging them before pairs or small groups rush upward in the water column to simultaneously release eggs and sperm. Spawning events often occur at dusk or follow lunar cycles.
A single female can release up to 40,000 buoyant eggs in one event. These eggs, suspended by oil droplets, are fertilized externally and hatch within 24 to 28 hours. The resulting larvae are planktonic, drifting with ocean currents while feeding on microscopic plankton. As they develop, the larvae begin to show yellow coloration and eventually settle on coral reefs, where the juveniles take shelter among branching corals.
As they mature, palette surgeonfish join loose schools on reefs. They become reproductively mature around 9 to 12 months old. Juveniles are mostly bright yellow, gradually transitioning to the iconic blue, black, and yellow pattern of adults.
Colourmorphs
Indian Ocean Morph
Indian Ocean Morph
Statistics
Gestation / Incubation Period
0 months
Interbirth Period
3 months
Reproduction Difficulty
Easy
Age Of Sexual Sterility
Death
Age Of Sexual Maturity
1 years
Juvenile1 years
Adult29 years
Elderly20 years
Animal Facts
The palette surgeonfish, like all surgeonfish, has sharp scalpel-like spines near its tail that are used for defense.
The palette surgeonfish is the only species within the genus Paracanthurus.
Juvenile palette surgeonfish are bright yellow.
Palette surgeonfish are omnivorous grazers, feeding on the zooplankton and algae in reef systems.
Palette surgeonfish can live for up to 30 years in the wild, making them a very long-lived reef fish species.
Conservation
The palette surgeonfish is a species of Least Concern, but is vulnerable to habitat degradation combined with high juvenile mortality. They are highly sought-after in the marine aquarium trade for their striking colors and fame but are not easily bred in captivity. Most specimens are collected directly from the wild, potentially damaging both fish and coral habitats. Climate change, ocean acidification, and coral bleaching threaten the reef ecosystems they depend on for shelter and food.
Scientists, conservation groups, and aquaculture institutions seek to reduce reliance on wild-caught fish, with the first captive breeding success in 2016. Marine protected areas, reef restoration projects, and stricter regulation of the aquarium trade play key roles in mitigating pressures. Public awareness campaigns encourage buying responsibly sourced fish, while international conservation efforts protect coral reef ecosystems more broadly.
These combined strategies safeguard the palette surgeonfish and help preserve the tropical reef communities where they serve an important ecological role.
Native Range
Indo-Pacific reefs and coasts
Statistics
Wild Population
Unknown
Conservation Status
Least Concern
Valid Release Group Types
Mixed Group
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Aquatic Feeder - Flakes
