David Fleetham / Bigeye emperor (Monotaxis grandoculis) hovering in midwater, Hawaii.

Pascal Kobeh / School of Yellowspot emperors (Gnathodentex aureolineatus) Palau. Philippine Sea.

Alex Mustard / School of Bluescale emperors (Lethrinus nebulosus) gathered for spawning. This species is usually solitary predator on the coral reef. Yolanda Reef, Ras Mohammed Marine Park, Sinai, Egypt. Red Sea.

Georgette Douwma / A school of Spangled emperors (Lethrinus nebulosus) accompanied by one Jack (Caranx sexfasciatus) over coral reef. Egypt, Red Sea.

Georgette Douwma / Yellowspot emperors (Gnathodentex aurolineatus) schooling on coral reef, Maldives, Indian Ocean

GEORGETTE DOUWMA / Longface emperor (Lethrinus olivaceus) able to change pattern and colour which makes for very effective camouflage. Andaman Sea, Thailand.

GEORGETTE DOUWMA / Longface emperor (Lethrinus olivaceus) able to change pattern and colour which makes for very effective camouflage. Andaman Sea, Thailand.

GEORGETTE DOUWMA / Bigeye emperor (Monotaxis grandoculis) with gorgonian coral and purple encrusting sponge, Misool, Raja Ampat, West Papua, Indonesia.

GEORGETTE DOUWMA / Bigeye emperor (Monotaxis grandoculis) with gorgonian coral and purple encrusting sponge, Misool, Raja Empat, West Papua, Indonesia.

GEORGETTE DOUWMA / Bigeye emperor (Monotaxis grandoculis) and purple encrusting sponge. Misool, Raja Ampat, West Papua, Indonesia.

GEORGETTE DOUWMA / Longface emperor (Lethrinus olivaceus) Sipadan, Malaysia.

GEORGETTE DOUWMA / Yellowspot emperor (Gnathodentex aurolineatus) schooling. Sipadan, Malaysia.

GEORGETTE DOUWMA / Bigeye emperor {Monotaxis grandoculis} being cleaned by Cleaner wrasse {Labroides dimidiatus}, Red Sea, Egypt

GEORGETTE DOUWMA / Spangled emperor {Lethrinus nebulosus} being cleaned by Cleaner wrasse {Labroides dimidiatus}, Red Sea, Egypt

Constantinos Petrinos / Bigeye emperor fish {Monotaxis grandoculis} on Ras Mohammed coral reef, Red Sea, Egypt

David Fleetham / Bigeye emperor (Monotaxis grandoculis), Sipidan Island, Malaysia.

David Fleetham / Bigeye emperor (Monotaxis grandoculis), Hawaii.

David Fleetham / Yellowspot emperor (Gnathodentex aurolineatus), Rarotonga, Cook Islands.

David Fleetham / Bigeye emperor (Monotaxis grandoculis), Hawaii.

David Fleetham / Yellowspot emperor (Gnathodentex aurolineatus), shoaling with Yellowfin goatfish (Mulloidichthys vanicolensis), with diver swimming behind, Rarotonga, Cook Islands.

GEORGETTE DOUWMA / Longface emperor {Lethrinus olivaceus} Andaman Sea, Thailand

Doug Perrine / Schooling Bigeye emperors (Monotaxis grandoculis), Honokohau, North Kona, Hawaii, Pacific Ocean.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) group standing on the freshly formed sea ice in front of open water where other emperors are in the water swimming, Atka Bay, Antarctica, April.

Willem Kolvoort / Sky emperors (Lethrinus mahsena) shoaling in Passe Dubois / Dubois channel, Aldabra, Indian Ocean

Willem Kolvoort / Sky emperors (Lethrinus mahsena) shoaling in Passe Dubois / Dubois channel, Aldabra, Indian Ocean