Tony Wu / Twinspot snapper (Lutjanus bohar) shoal rushing up to spawn, releasing a cloud of milky white sperm and eggs in the water column. Caroline Islands, Palau, November.

Tony Wu / Twinspot snapper (Lutjanus bohar) engaged in a mass spawning aggregation early in the morning. Caroline Islands, Palau. April. Winner of Underwater category, Wildlife Photographer of the Year 2016.

Alex Mustard / Portrait of pair of Bohar snappers (Lutjanus bohar) in their spawning aggregation. Shark Reef, Ras Mohammed Marine Park, Sinai, Egypt. Red Sea.

Alex Mustard / Portrait of Bohar snappers (Lutjanus bohar) in its spawning aggregation. Shark Reef, Ras Mohammed Marine Park, Sinai, Egypt. Red Sea.

Jabruson / Mozambican children with captive passerines including Red-throated Twinspot (Hypargos niveoguttatus). Birds are caught to eat whilst watching fields against crop raiding baboons. Pemba to Montepuez hi...

Juergen Freund / Two Twinspot / Crabeye gobies (Signigobius biocellatus) West New Britain, Papua New Guinea.

Georgette Douwma / Shoal of Bohar / Twinspot snapper {Lutjanus bohar} Ras Mohammed, Red Sea, Egypt

Ann & Steve Toon / Pink-throated twinspot (Hypargos margaritatus), Zimanga private game reserve, KwaZulu-Natal, South Africa.

Georgette Douwma / Crab-eye goby / goby (Signigobius biocellatus). West Papua, Indonesia. Indo-West Pacific.

Alex Mustard / School of Bohar snapper (Lutjanus bohar) swimming in formation along a coral reef. These fish are usually solitary and aggregate each summer in the Red Sea to spawn. Ras Mohammed National Park, Sinai...

Alex Mustard / School of Bohar snapper (Lutjanus bohar) in open water above a coral reef. These fish are usually solitary and aggregate each summer in the Red Sea to spawn. Shark Reef, Ras Mohammed, Sinai, Egypt. Re...

Alex Mustard / School of Bohar snapper (Lutjanus bohar) in open water close to a coral reef. These fish are usually solitary and aggregate each summer in the Red Sea to spawn. Shark Reef, Ras Mohammed, Sinai, Egypt....