Gary Bell/ Oceanwide / Cross-hatch Butterflyfish (Chaetodon xanthurus), Anilao, Philippines

Gary Bell/ Oceanwide / Cross-hatch Butterflyfish (Chaetodon xanthurus) pair, Anilao, Philippines

GEORGETTE DOUWMA / Cross-hatch butterflyfish (Chaetodon xanthurus) Lembeh Strait, North Sulawesi, Indonesia

Joel Sartore / Photo Ark / Pearlscale butterflyfish (Chaetodon xanthurus) portrait, private collection, USA. Captive, occurs in Indo-Pacific.

Joel Sartore / Photo Ark / Pearlscale butterflyfish (Chaetodon xanthurus) portrait, private collection, USA. Captive, occurs in Indo-Pacific.

Georgette Douwma / RF - Composite image of blue tropical reef fish on a black background, Blue triggerfish (Pseudobalistes fuscus), Elonggate surgeonfish (Acanthurus mata), Yellowtail tang (Zebrasoma xanthurum), Neon da...

Georgette Douwma / Blue tropical reef fish composite image on black background, Blue triggerfish (Pseudobalistes fuscus), Bicolour angelfish (Centropyge bicolor), Elongate surgeonfish (Acanthurus mata), Yellowtail tang...

Joel Sartore / Photo Ark / Pearlscale butterflyfish (Chaetodon xanthurus) swimming into view before leaving, The Fish Store, Nebraska, Lincoln, USA.