Gary Bell/ Oceanwide / Painted Sweetlips (Diagramma pictum) in Slender Cardinalfish (Rhabdamia gracilis) school near Double-headed Maori Wrasse (Cheilinus undulatus), Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Double-headed Maori Wrasse (Cheilinus undulatus), Painted Sweetlips (Diagramma pictum), and Slender Cardinalfish (Rhabdamia gracilis) school, Great Barrier Reef, Queensland, Australia

Alex Mustard / Napoleon wrasse (Cheilinus undulatus) super male, patrolling coral, Ras Mohammed Marine Park, Sinai, Egypt. Red Sea

Alex Mustard / Group of predators hunting together, in an example of 'Nuclear foraging'. The Moray eel (Gymnothorax javanicus) flushes out prey, and is followed by a Napolean wrasse (Cheilinus undulatus) and a Bluef...

Alex Mustard / Portrait of Bandcheek wrasse (Oxycheilinus digrammus) taken during the day. Anemone City, Ras Mohammed Marine Park, Gulf of Aqaba, Red Sea. Sinai, Egypt.

Chris Newbert / Double-headed Maori Wrasse (Cheilinus undulatus) swimming over coral reef, Red Sea, Egypt

Alex Mustard / Napoleon wrasse (Cheilinus undulatus) on a coral reef. Ras Mohammed National Park, Sinai, Egypt. Red Sea

Magnus Lundgren / Wild Wonders of China / Ringtail wrasse (Oxycheilinus unifasciatus) Green Island, a small volcanic island in the Pacific Ocean, Taiwan

Gary Bell/ Oceanwide / Double-headed Maori Wrasse (Cheilinus undulatus), Great Barrier Reef, Queensland, Australia

Georgette Douwma / Two spot wrasse (Oxycheilinus bimaculatus) male. West Papua, Indonesia. Indo-West Pacific.

Georgette Douwma / Two spot wrasse (Oxycheilinus bimaculatus) male. West Papua, Indonesia. Indo-West Pacific.

Richard Robinson / Sulawesi wrasse (Oxycheilinus celebicus ) Yagasa Lagoon, Lau Island Group, Fiji.