David Fleetham / Bigeye emperor (Monotaxis grandoculis) foraging over sand at night, Hawaii.

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

Linda Pitkin / Bigeye emperor fish (Monotaxis grandoculis) Ras Ghozlani, Ras Mohammed National Park, Egypt, Red Sea.

Pascal Kobeh / Bluestreak cleaner wrasses (Labroides dimidiatus) cleaning Bigeye emperor (Monotaxis grandoculis) Sudan. Red Sea.

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 / Bigeye emperor {Monotaxis grandoculis} 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

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

Jeff Rotman / Bigeye emperor fish {Monotaxis grandoculis} on coral reef table, Red Sea, Egypt

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