Centropyge heraldi
Solid yellow reef dweller logged across Sulawesi and the Philippines, comfortable in 27-29C water year-round.
A small, entirely yellow fish, rarely more than 8 cm, with an oval, laterally flattened body typical of dwarf angelfish. The only real marking to check for is a faint blue-edged line through the eye, more visible on some individuals than others; otherwise the body is unbroken yellow with no bars, spots or blue trim. It moves in short darts between coral heads rather than cruising open water like the larger angelfish species.
Expect to find it picking around coral rubble and low reef structure, often alone or in loose pairs, browsing algae and small invertebrates off the substrate. It is not a fish that schools or shows off in open water, and it tends to duck into crevices the moment a diver gets too close, so a slow approach and some patience pays off. Most sightings are logged as uncommon even within its stronghold regions, so it rewards divers who take time looking into reef nooks rather than scanning mid-water.
Like other dwarf angelfish, it is a protogynous hermaphrodite, meaning individuals start life as female and some later change to male, letting small harem groups maintain a breeding male without needing to find one from elsewhere on the reef.
No clear seasonal pattern shows up in the data, and its 27 to 29.4C temperature niche sits within tropical reef norms all year, so it is a fair-weather, any-month target rather than a seasonal one.
Most reliably logged in the Philippines and Indonesia, with strong site counts in Sulawesi, Luzon, Palawan, Mindanao and the Visayas, and in Nusa Tenggara further east. Outside those strongholds it turns up on reefs in Queensland, Sabah in Malaysia, Micronesia, Fiji, Japan and Brunei, generally as an uncommon rather than guaranteed sighting.
Mapping where Herald's Angelfish is logged…
Best chances are in the Philippines, particularly Luzon, Palawan, Mindanao and the Visayas, and in Indonesia, especially Sulawesi and Nusa Tenggara. It also shows up on reefs in Queensland, Sabah, Micronesia, Fiji, Japan and Brunei, though less frequently.
There's no strong seasonal signal in sightings, and its preferred water temperature of roughly 27 to 29.4C is typical of tropical reefs year-round, so any month works for a dive trip targeting it.
Look for a small, all-yellow fish under 8 cm with an oval body and, on close inspection, a faint blue line through the eye. It lacks the bars, blue edging or spots seen on many other dwarf angelfish, which makes the plain yellow body itself the giveaway.
They max out around 8 cm, putting them firmly in the dwarf angelfish size class, small enough to be easy to swim past if you're not looking closely at reef crevices.
It's a protogynous hermaphrodite, starting life female and with some individuals later turning male, a common strategy among dwarf angelfish for keeping small harem groups breeding.
Site and sighting data is aggregated from diver logs, iNaturalist and GBIF. For taxonomy and conservation status:
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