Alex Mustard / Close up of the scale details of a Yellow-mask angelfish (Pomacanthus xanthometopon). Baa Atoll, Maldives. Indian Ocean

Norbert Wu / Scribble-faced Angelfish (Pomacanthus xanthometopon), Indo-Pacific

Gary Bell/ Oceanwide / Blue-streaked Cleaner Wrasse (Labroides dimidiatus) cleaning Scribble-faced Angelfish (Pomacanthus xanthometopon), Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Scribble-faced Angelfish (Pomacanthus xanthometopon) with a cleaner fish, Great Barrier Reef, Australia

Georgette Douwma / RF - Composite image of blue tropical reef fish on a black background, Blue triggerfish (Pseudobalistes fuscus), Elonggate surgeonfish (Acanthurus mata), Yellowtail tang (Zebrasoma xanthurum), Neon da...

Georgette Douwma / Tropical angelfish composite image on black background, Blue-ringed angelfish (Pomacanthus annularis), Semicircle angelfish (Pomacanthus semicirculatus), Blacktail angelfish (Centropyge eibli), Regal...

Georgette Douwma / Blue tropical reef fish composite image on black background, Blue triggerfish (Pseudobalistes fuscus), Bicolour angelfish (Centropyge bicolor), Elongate surgeonfish (Acanthurus mata), Yellowtail tang...