Georgette Douwma / Pyramid butterflyfish (Hemitaurichthys polylepis}. North Sulawesi, Indonesia.

Pascal Kobeh / Pyramid butterflyfish (Hemitaurichthys polylepis) being cleaned by a common cleanerfish (Labroides dimidiatus) Palau, Philippine Sea

Georgette Douwma / Black pyramid butterflyfish (Hemitaurichthys zoster) over table coral on shallow reef top. Maldives, Indian Ocean

Aflo / ic-08503 Pyramid butterflyfish {Hemitaurichthys polylepis}

Fred Bavendam / Pyramid Butterflyfish (Hemitaurichthys polylepis), Indonesia

David Fleetham / Slate pencil sea urchins (Heterocentrotus mammillatus), Pennantfish (Heniochus diphreutes) and Pyramid butterflyfish (Hemitaurichthys polylepis), Hawaii.

David Fleetham / Slate pencil sea urchins (Heterocentrotus mammillatus) and Pyramid butterflyfish (Hemitaurichthys polylepis), Hawaii.

David Fleetham / Pyramid butterflyfish (Hemitaurichthys polylepis), Hawaii.

David Fleetham / Slate pencil sea urchins (Heterocentrotus mammillatus) and Pyramid butterflyfish (Hemitaurichthys polylepis), Hawaii.

Doug Perrine / Pyramid butterflyfish (Hemitaurichthys polylepis) portrait, North Kona, Hawaii, Pacific Ocean.

David Fleetham / Pyramid butterflyfish (Hemitaurichthys polylepis) with miscellaneous reef fish above the hard coral reef, Molokini Marine Preserve, Maui, Hawaii, Pacific Ocean.

David Fleetham / Coral reef with Slate pencil sea urchins (Heterocentrotus mammillatus), Pennantfish (Heniochus diphreutes) and Pyramid butterflyfish (Hemitaurichthys polylepis) and a diver holding a light, Hawaii. Mo...