Sunburst butterflyfish

Sunburst Butterflyfish
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Western color morph at Pemba Island (Tanzania)
Conservation status
Least Concern (IUCN 3.1)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Perciformes
Family:	Chaetodontidae
Genus:	Chaetodon (but see text)
Subgenus:	Lepidochaetodon
Species:	C. (L.) kleinii
Binomial name
Chaetodon (Lepidochaetodon) kleinii Bloch, 1790
Synonyms
Chaetodon corallicola Snyder, 1904

The Sunburst Butterflyfish, Chaetodon kleinii, is also known as the Black-lipped Butterflyfish (or "blacklip butterflyfish") or Klein's Butterflyfish.

It is a native of the Indo-Pacific region, from the Red Sea and East Africa to the Hawaiian Islands and Samoa, north to southern Japan, south to Australia and New Caledonia. It is also found in Galapagos Islands in the Eastern Pacific.

Under its junior synonym C. corallicola was placed in the monotypic subgenus Tifia, but this cannot be separated from the earlier-described Lepidochaetodon (sometimes considered a separate genus). It appears to be closer to the Tahiti Butterflyfish (C. trichrous) than to the Teardrop Butterflyfish (C. unimaculatus).

Description and ecology

The body of this fish is yellowish brown with 1-2 broad lighter vertical bars, one running from near the origin of the dorsal spine to the belly, and sometimes another running from the middle of the back to the center of the body. A black bar runs vertically across the eye, and the part before this is whitish, with a black snout. The color varies somewhat across the range; western specimens usually have one beige bar, while eastern ones have two white bars. There may be numerous dotted horizontal stripes on the sides, or another dark band between the two light ones in eastern specimens.

In the wild, the Sunburst Butterflyfish is found at depths of 4–61 meters, usually in deeper lagoons and channels and seaward reefs, swimming singly, or (particularly during breeding) in pairs. These fish are oviparous.

They are omnivores, feeding mainly on soft coral polyps (especially Litophyton viridis and Sarcophyton tracheliophorum), algae and zooplankton. In the aquarium, Chaetodon kleinii will eat meaty food such as mysis. Its coral-eating habits can become a nuisance, but on the other hand they are fond of Aiptasia, small sea anemones that often become a pest in seawater aquaria.