Chaetodon guttatissimus
Small, spotted reef fish logged across the Maldives' Northern Atolls and Luzon, comfortable in 24-29C water year-round.
A small, disc-shaped fish around 8 cm, pale grey to silvery-white with rows of fine dark speckles scattered across the flanks, giving it a peppered look rather than bold bars or stripes. A dark band runs vertically through the eye, and the tail carries a narrow dark margin. It moves in that classic butterflyfish way, pecking at the reef surface rather than schooling in open water.
Usually spotted alone or in loose pairs, working slowly over coral heads and rubble patches picking at small invertebrates. It tends to stay close to reef structure rather than venturing into the open, and divers who hold still often get a closer look as it continues feeding, unbothered. Most sightings come from reef flats and slopes in the shallower to mid-depth range rather than deep drop-offs.
Like most butterflyfish it feeds on small, hard-to-reach invertebrates picked directly off coral and rock, a role that helps keep reef surfaces grazed clean of algae and sessile prey.
No clear seasonal pattern in the sighting data, and its comfort range of roughly 24.7 to 29.2 C covers tropical reefs year-round, so any month is fair game at the sites above.
Reef neighbours a diver could mistake it for. Use the identification notes above to tell them apart.
Most reliably logged in the Maldives, especially the Northern, Southern and Central Atolls, and a strong presence across the Philippines in Luzon, Palawan, Mindanao and the Visayas. Indonesia, particularly Sulawesi, also turns up frequently, with smaller but consistent numbers in Malaysia, the Seychelles, Egypt, Saudi Arabia and South Africa.
Mapping where Peppered Butterflyfish is logged…
The Maldives is the strongest bet, particularly the Northern, Southern and Central Atolls, followed by the Philippines (Luzon, Palawan, Mindanao, Visayas) and Indonesia's Sulawesi region.
There's no strong seasonal signal in the data, and it tolerates a wide tropical temperature range of about 24.7 to 29.2 C, so it's a year-round sighting on the reefs where it occurs.
Look for a small, pale grey to silvery fish covered in fine dark speckles, with a dark vertical band through the eye and a thin dark trim on the tail. It usually stays close to the reef, pecking at the surface.
They stay small, typically around 8 cm, making them one of the more modestly sized butterflyfish you'll see on a reef.
No, they pose no threat to divers. They're small reef grazers that will simply continue feeding or move off if approached.
Site and sighting data is aggregated from diver logs, iNaturalist and GBIF. For taxonomy and conservation status:
