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

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...

David Fleetham / Slate pencil sea urchins (Heterocentrotus mammillatus) on coral reef with Pyramid butterflyfish (Hemitaurichthys polylepis), Hawaii.

David Fleetham / Pyramid butterflyfish (Hemitaurichthys polylepis) and Pennant bannerfish (Heniochus chrysostomus) at depth of 130 feet where many reef fish migrated after two ocean warming episodes, Hawaii.

Georgette Douwma / Pyramid butterflyfish (Hemitaurichthys polylepis) in coral reef Derawan Islands, East Kalimantan, Indonesia.

Frederique Olivier / Brushytoothed butterflyfish (Hemitaurichthys polylepis) feeding on reef edge , Uepi Island, Solomon Islands.

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