Chaetodon madagaskariensis
Spot this small white-and-black butterflyfish across the Maldives' atolls, year-round in 23-29C reef water.
A small, deep-bodied butterflyfish, only about 9 cm, with a white body crossed by a bold black vertical bar through the eye and a second dark bar near the tail. The dorsal, anal and tail fins carry a fine yellow-orange trim, and a faint diagonal shading pattern runs across the flank. It swims with the flattened, disc-shaped silhouette typical of the family, usually alone or in a loose pair, close to coral cover.
Usually seen picking around coral heads and rubble patches, working the reef alone or in a loose pair rather than in groups. It tends to stay close to structure and will duck into cover if approached too fast, but generally goes about its business at a relaxed pace if divers keep some distance. Sightings run from shallow reef flats down well past recreational depths, so it isn't tied to any one part of the reef profile.
Like other butterflyfish it feeds mainly on small invertebrates and coral polyps picked directly off the reef surface, which ties it closely to healthy, structurally complex coral cover rather than open sand or rubble zones.
No clear seasonal pattern shows up in the sightings, and it's comfortable across a wide 23.3 to 29.1C range, so it's a fair bet on tropical reefs at any time of year.
Reef neighbours a diver could mistake it for. Use the identification notes above to tell them apart.
Most reliably logged across the Maldives, with strong numbers through the Northern, Central and Southern Atolls, making it one of the more dependable butterflyfish sightings in that country. Beyond the Maldives it turns up regularly in Mauritius (notably Flic-en-Flac), along Mozambique's Inhambane coast, in KwaZulu-Natal in South Africa, and around Reunion's Saint-Paul and Saint-Leu sites, with further records from Madagascar, Kenya and Seychelles.
Mapping where Seychelles Butterflyfish is logged…
The Maldives is the strongest bet, especially the Northern, Central and Southern Atolls. It's also logged regularly in Mauritius, Mozambique, South Africa's KwaZulu-Natal coast, Reunion, Madagascar, Kenya and the Seychelles.
There's no strong seasonal signal in the sightings, and it tolerates a broad 23.3 to 29.1C range, so it's seen on reefs year-round rather than during a specific window.
Look for a small white, disc-shaped fish around 9 cm with a black bar through the eye, a second dark bar near the tail, and fine yellow trim on the fins. It's usually alone or in a pair close to coral cover.
They stay small, typically around 9 cm, which is on the compact end for reef butterflyfish and easy to overlook against busier coral backgrounds.
No. They pose no threat to divers and simply carry on feeding around coral if you keep a respectful distance.
Site and sighting data is aggregated from diver logs, iNaturalist and GBIF. For taxonomy and conservation status:
