Georgette Douwma / Orangestriped triggerfish (Balistapus undulatus). Egypt, Red Sea.

Georgette Douwma / Orangestriped triggerfish (Balistapus undulatus). Egypt, Red Sea.

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.

Michael Pitts / Orange-striped triggerfish (Balistapus undulatus) and Sixspot groupers (Cephalopholis sexmaculata) on a sunken shipwreck, Maldives, Indian Ocean.

Alex Mustard / Clown triggerfish (Balistoides conspicillum) between pair of Seafans (Melithaea sp.) Fiabacet Islands, Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea.

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 / Clown triggerfish (Balistoides conspicillum) Maldives, Indian Ocean

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