David Fleetham / Moustache triggerfish (Balistoides viridescens) blowing water to aerate nest of eggs. Yap, Micronesia.

David Fleetham / Titan / Giant triggerfish (Balistoides viridescens) eating Parrotfish (Scaridae) while five orange-lined triggerfish (Balistapus undulatus) watch. Philippines.

David Fleetham / Titan triggerfish (Balistoides viridescens) getting attention of four Scarlet cleaner shrimp (Lysmata amboinensis) off Tulamben, Bali, Indonesia.

Linda Pitkin / Titan triggerfish (Balistoides viridescens), guarding nest site, in head down pose Sataya South, Fury Shoal, Egypt, Southern Red Sea

Constantinos Petrinos / Titan triggerfish (Balistoides viridescens) feeding on sea urchin, Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Titan triggerfish (Balistoides viridescens) feeding on sea urchin, Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Titan triggerfish (Balistoides viridescens) with a Bluestreak cleaner wrasse (Labroides dimidiatus) Andaman Sea, Thailand.

Pascal Kobeh / Giant triggerfish (Balistoides viridescens) building its nest, Sudan. Red Sea.

Pascal Kobeh / Bluestreak cleaner wrasse (Labroides dimidiatus) cleaning Titantriggerfish (Balistoides viridescens) Maldives. Indian Ocean.

Alex Mustard / Male Napoleon wrasse (Cheilinus undulatus) fighting with Titan triggerfish (Balistoides viridescens) defending its large clutch of eggs. Shark Reef, Ras Mohammed Marine Park, Sinai, Egypt. Red Sea.

Alex Mustard / Large, male Napoleon wrasse (Cheilinus undulatus) demolishes the nest of Titan triggerfish (Balistoides viridescens) eating its large clutch of eggs. Shark Reef, Ras Mohammed Marine Park, Sinai, Egypt...

Jabruson / Fisherman holding a 3 kg Titan triggerfish (Balistoides viridescens) Wasini Island of the coast of Kenya, February 2011

Franco Banfi / Titan trigger fish (Balistoides viridescens) foraging in coral for mussels, Maldives, Indian Ocean

Franco Banfi / Titan trigger fish (Balistoides viridescens) foraging amongst coral for mussels, Maldives, Indian Ocean

Franco Banfi / Titan trigger fish (Balistoides viridescens) Maldives, Indian Ocean

Juergen Freund / Titan / Giant / Moustache triggerfish (Balistoides viridescens). Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Titan triggerfish (Balistoides viridescens) portrait, Bali, Indo-pacific.

Georgette Douwma / Giant / Titan triggerfish (Balistoides viridescens) feeding on coral reef and attracting wrasses, a bream, boxfish and butterflyfish, all hoping for scraps. One of the most feared fish by divers becau...

Jeff Rotman / Giant / Titan triggerfish (Balistoides viridescens) swimming past coral, Red Sea

Fred Bavendam / Titan Triggerfish (Balistoides viridescens) female blowing on her eggs to aerate them, Bali, Indonesia

Fred Bavendam / Titan Triggerfish (Balistoides viridescens) male attacking the fin of a diver who has come to close to its nest, Bali, Indonesia

Fred Bavendam / Titan Triggerfish (Balistoides viridescens) aerating clutch of eggs, Bali, Indonesia

Fred Bavendam / Titan Triggerfish (Balistoides viridescens) with spines from a sea urchin it has eaten, Bali, Indonesia

GEORGETTE DOUWMA / Titan triggerfish (Balistoides viridescens). Lembeh Strait, North Sulawesi, Indonesia.

GEORGETTE DOUWMA / Giant triggerfish (Balistoides viridescens) feeding. Lembeh Strait, North Sulawesi, Indonesia.

GEORGETTE DOUWMA / Titan triggerfish (Balistoides viridescens) investigating bivalve. Lembeh Strait, North Sulawesi, Indonesia.

GEORGETTE DOUWMA / Orangestriped triggerfish (Balistapus undulatus) attracted by a coral breaking Titan triggerfish (Balistoides viridescens) in the background. Andaman Sea, Thailand

GEORGETTE DOUWMA / Titan Moustache / triggerfish (Balistoides viridescens), chewing on coral, with a Regal angelfish (Pygoplites diacanthus) taking advantage of the exposed rock. Andaman Sea, Thailand

GEORGETTE DOUWMA / Titan / Moustache triggerfish (Balistoides viridescens) breaking up Blue coral (Heliopora coerulea). Blue coral is a member of the subclass Octocorall and is a living fossil. Andaman Sea, Thailand

GEORGETTE DOUWMA / Titan triggerfish (Balistoides viridescens), Bali, Indonesia

GEORGETTE DOUWMA / Titan triggerfish (Balistoides viridescens) searching for food on seabed, Bali, Indonesia

GEORGETTE DOUWMA / Titan triggerfish (Balestoides viridescence) with Cleaner wrasse (Labroides dimidiates), Bali, Indonesia

GEORGETTE DOUWMA / Titan triggerfish (Balestoides viridescence) blowing in the sand to expose prey like molluscs or crustaceans, Bali, Indonesia

GEORGETTE DOUWMA / Titan triggerfish aerating eggs in nest {Balistoides viridescens} Thailand

GEORGETTE DOUWMA / Titan triggerfish (Balistoides viridescens) feeding on coral. Malaysia.

GEORGETTE DOUWMA / Titan triggerfish feeds on coral. Wrasses waiting for escaping prey. Andaman Sea

GEORGETTE DOUWMA / Titan triggerfish (Balistoides viridescens) feeding on coral. Indonesia.

GEORGETTE DOUWMA / Titan triggerfish feeding. (Balistoides viridescens) Celebes sea, Sabah, Malaysia.

GEORGETTE DOUWMA / Titan triggerfish {Balistoides viridescens} Andaman Sea, Thailand

GEORGETTE DOUWMA / Titan triggerfish {Balistoides viridescens} and Cleaner wrasse, Andaman Sea,

Fred Bavendam / Titan Triggerfish (Balistoides viridescens) attacking a Long Spine Sea Urchin (Diadema setosum) it has dislodged from between rocks, Bali, Indonesia

Martha Holmes / Titan triggerfish {Balistoides viridescens} at cleaning station Red Sea

GEORGETTE DOUWMA / Titan triggerfish aerating eggs in nest. Thailand {Balistoides viridescens}

GEORGETTE DOUWMA / Titan triggerfish feeding. (Balistoides viridescens) Celebes sea, Sabah, Malaysia.

Francis Abbott / Triton triggerfish searching for food {Balistoides viridescens} Red Sea

Constantinos Petrinos / Titan triggerfish hunting {Balistoides viridescens} - stirs up sand by blasting stream of water at seabed to expose prey. Lembeh Strait, North Sulawesi Indonesia

Hiroya Minakuchi / Scarlet Cleaner Shrimp (Lysmata amboinensis) cleaning Titan Triggerfish (Balistoides viridescens)

Georgette Douwma / Triggerfish composite image on black background, Arabian picassofish (Rhinecanthus assasi), Orangestriped triggerfish (Balistapus undulatus), Titon triggerfish (Balistoides viridescens) with two juven...

Pascal Kobeh / Giant triggerfish (Balistoides viridescens) building its nest among the corals in the reef with several other fish species nearby, Red Sea, Egypt.

Tui De Roy / Titan triggerfish (Balistoides viridescens) Tulamben, North coast, Bali, Indonesia. Lesser Sunda Islands.

Frederique Olivier / Close up of the mouth of a Titan triggerfish (Balistoides viridescens) grazing on coral surface, Uepi Island, , Uepi Island,

Frederique Olivier / Titan triggerfish (Balistoides viridescens) grazing on coral surface, Uepi Island, Solomon Islands.

Frederique Olivier / Close up of a Titan triggerfish (Balistoides viridescens) grazing on coral surface, Uepi Island, Solomon Islands.

Frederique Olivier / Wide angle shot of a Titan triggerfish (Balistoides viridescens) grazing on coral surface, Uepi Island, Solomon Islands.