Regal Angelfish
Pygoplites Diacanthus
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Quick Facts
Distribution
- The Regal Angelfish is one of the most eye-catching fish on any coral reef. Its body is wrapped in bold white bars edged in black and yellow, making it hard to miss among the corals.
- It grows to about 25 cm long and can live for up to 15 years.
- In Australia, Regal Angelfish are found along the tropical north, from the north-west coast of Western Australia around to southern New South Wales. Beyond Australia, they range all the way from East Africa and the Red Sea across to the islands of the central Pacific.
- This is a reef fish that likes areas with plenty of coral. It is often spotted near caves and ledges, where it ducks in and out of the reef structure.
- Regal Angelfish feed almost entirely on sponges and tunicates, soft-bodied animals that grow fixed to the reef. Few reef fish specialise in this kind of food, which makes this species unusual among its neighbours.
- They are usually seen alone or in pairs, though small groups do turn up on occasion. Juveniles are more secretive, tucking themselves into cracks and crevices in the reef.
- Young Regal Angelfish look similar to adults but lean more orange than yellow. They also have a distinct eye-like spot on the back part of the dorsal fin, which fades as they grow.
- The tail fin is a clean yellow, and the soft part of the dorsal fin is blue with dark scribbled markings. These colours make each fin easy to pick out from a distance underwater.
- Like other angelfish, they likely spawn in pairs, releasing eggs and sperm into the open water above the reef. The eggs drift away on the currents before hatching.
- Recent research has found that what looks like one species is actually three genetically distinct groups: one from the Pacific, one from the Indian Ocean and one from the Red Sea. The Australian population sits within the Pacific group.
- Despite its fame among divers, the Regal Angelfish is notoriously difficult to keep alive in an aquarium. It is collected heavily for the trade but rarely survives long in captivity.
Species Interaction
Regal Angelfish: A Reef Jewel Prized by Divers and Aquarists
- Snorkelling & Diving
- Aquarium
- Research & Rare Encounters
- Ecosystem Role
The Regal Angelfish is one of the most visually striking fish on Indo-Pacific reefs, making it a highlight for snorkellers and divers along Australia’s tropical north and Great Barrier Reef. Its bold banded colouring also makes it highly sought after in the marine aquarium trade, where it is collected across its range. Researchers studying coral reef fish communities encounter it regularly as a representative of reef health and diversity.
Scientific Classification
- Kingdom: Animalia
- Phylum: Chordata
- Class: Teleostei
- Order: Acanthuriformes
- Family: Pomacanthidae
- Genus: Pygoplites
- Species: Pygoplites diacanthus
Conservation Status
The Regal Angelfish has not been assessed by the IUCN Red List, and it holds no listing under Australia’s EPBC Act. It is a reef-associated species of the Indo-Pacific with no current formal conservation classification at the global or national level.
Interaction Highlights
Diving
Commonly seen near caves and ledges on tropical reefs from 1 to 48 metres.
Aquarium
Notoriously difficult to keep, yet one of the most recognisable angelfish in the trade.
Ecosystem
A sponge and tunicate feeder that grazes reef surfaces across the Indo-Pacific.
Regal Angelfish
As Aquarium Fish
Care Level: Difficult
Temperament: Semi-Aggressive
Diet: Carnivore
Reef Compatible: With caution
Minimum Tank Size: 120 gallons
Recreational Viewing
- Snorkeling & Scuba
Finding: Intermediate
Temperament: Shy
Location: Inner Reef, Outer Reef, Caves, Lagoon
Danger: None
