Georgette Douwma / Redtooth triggerfish (Odonus niger). North Sulawesi, Indonesia.

Georgette Douwma / Redtooth triggerfish (Odonus niger). North Sulawesi, Indonesia.

Georgette Douwma / Redtooth triggerfish (Odonus niger) Maldives.

Georgette Douwma / Red-mouth triggerfish (Odonus niger) with Bluestreak cleaner wrasse (Labroides dimidiatus) Raja Ampat, West Papua, Indonesia.

Doug Perrine / Hawaiian spinner dolphin (Stenella longirostris longirostris) pod, with male performing genital buzz courtship behaviour on female. A shoal of Black durgon triggerfish (Melichthys niger) swimming behi...

David Fleetham / Black triggerfish (Melichthys niger) resting on reef, displaying defensive colouration, Hawaii, Pacific Ocean.

David Hall / Black durgon (Melichthys niger) school swimming over reef, Big Island, Hawaii, Pacific Ocean.

David Hall / Waves breaking on volcanic rocks with schooling Green jacks (Caranx caballus) and Barred flagtails (Kuhlia mugil) with Black durgons (Melichthys niger) and Redtail triggerfish (Xanthichthys mento), Re...

David Hall / Waves breaking on volcanic rocks with schooling Green jacks (Caranx caballus) and a single Black durgon (Melichthys niger), Revillagigedo Islands, Mexico, Pacific Ocean.

David Hall / Waves breaking on volcanic rocks with schooling Green jacks (Caranx caballus), Barred flagtails (Kuhlia mugil) with Black durgons (Melichthys niger) and Redtail triggerfish (Xanthichthys mento), Revil...

Doug Perrine / Green sea turtle (Chelonia mydas) being cleaned of algae by Yellow tangs (Zebrasoma flavescens), Chevron tangs (Ctenochaetus hawaiiensis), Black durgon triggerfish (Melichthys niger) and Parrotfish (S...

Doug Perrine / Hawaiian hogfish (Bodianus albotaeniatus) male, with Bluestripe snapper (Lutjanus kasmira), and Black durgon triggerfish (Melichthys niger) swimming over reef with juvenile Gray reef sharks (Carcharhi...