GEORGETTE DOUWMA / Klein's butterflyfish (Chaetodon kleini) Lembeh Strait, North Sulawesi, Indonesia.

Fred Bavendam / Klein's Butterflyfish (Chaetodon kleinii) resting in a Sponge at night showing nocturnal coloration, Manado, North Sulawesi, Indonesia

Juergen Freund / Klein's butterflyfish feeds on corallimorph {Chaetodon kleinii} Great Barrier Reef

David Fleetham / Klein's butterflyfish (Chaetodon kleinii), Hawaii.

Georgette Douwma / Klein's butterflyfish (Chaetodon kleinii) feeding on polyps of gorgonian coral, Misool, Raja Ampat, West Papua, Indonesia.

Georgette Douwma / Klein's butterflyfish (Chaetodon kleinii) feeding at night on polyps of gorgonian coral / sea fan. Raja Ampat, West Papua, Indonesia

Russell Laman / Reef manta (Mobula alfredi) getting cleaned of parasites, dead skin, bacteria, and mucus by Blacklip butterflyfish (Chaetodon kleinii) and Moon wrasse (Thalassoma lunare) at a cleaning station in Raja...

Doug Perrine / Blacklip butterflyfish (Chaetodon kleinii) swimming over coral reef, Kona, Hawaii, Pacific Ocean.

Doug Perrine / Blacklip butterflyfish (Chaetodon kleinii) portrait, Kona, Hawaii, Pacific Ocean.

Doug Perrine / Blacklip butterflyfish (Chaetodon kleinii) portrait, Kona, Hawaii, Pacific Ocean.

Sirachai Arunrugstichai / School of Sunburst butterflyfishes (Chaetodon kleinii) swoop in to feed on the eggs of Sergeant major (Abudefduf saxatilis) Lembeh Strait, North Sulawesi, Indonesia.

Sirachai Arunrugstichai / School of Sunburst butterflyfishes (Chaetodon kleinii) swimming along the reefs, while waiting to feed on the eggs of Sergeant major (Abudefduf saxatilis), Lembeh Strait, North Sulawesi, Indonesia.