Marine life  /  Butterflyfish  /  Copperband butterflyfish
Reviewed 2026-09-06
Species entry

Copperband butterflyfish

Chelmon rostratus

A long-snouted butterflyfish of silty inshore reef rather than clear coral.

Size
To 20 cm
Depth
3–25 m
Habitat
Silty reef, rubble and jetty pilings
Active
Daylight
Range
Indo-Pacific
Rarity
Lembeh Strait
2 stars of 5, usually seen in a week
Copperband butterflyfish, Chelmon rostratus

To about 20 cm, silver-white with four orange-brown vertical bands edged in black, a black-ringed false eyespot at the rear of the dorsal fin, and a long forceps-like snout used to pick invertebrates out of crevices and sponges. The eyespot and the true eye’s dark band work together: at rest the fish reads as facing the wrong way.

It prefers turbid inshore water, silty slopes, rubble and jetty pilings, and is more often recorded on muck sites than on clear outer reef. Usually in pairs, moving steadily and probing continuously. Approach is easier from below than from above, since the fish drifts downward and forward when disturbed rather than fleeing. Recorded from about 3 to 25 m.

Where to find:

LocationRarity Best monthsDepthHabitat
Lembeh Strait Indonesia editorial estimate
2 stars of 5, usually seen in a week
Year-round
3–25 m
Silty reef, rubble and jetty pilings
Ambon Indonesia editorial estimate
2 stars of 5, usually seen in a week
Year-round
3–25 m
Silty reef and jetty structure
Australia Australia editorial estimate
2 stars of 5, usually seen in a week
Year-round
1–25 m
Coral reef and jetty pylons, tropical north
Anilao Philippines editorial estimate
3 stars of 5, a good week should turn one up
Year-round
3–25 m
Rubble and coral reef
Dauin & Dumaguete Philippines editorial estimate
3 stars of 5, a good week should turn one up
Year-round
3–25 m
Rubble and reef edges

Ratings are per location: 1 means found on most dives that look for it, 5 means a handful of records. Where enough dives have been logged the figure is calculated from them; otherwise it is an editorial estimate, and says so. We publish habitat and destination, not the dive site.

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Chaetodon striatus
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brown-and-white butterflyfish
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