Alex Mustard / Midnight snapper (Macolor macularis) shelters in a cavern on a coral reef with white soft corals (Scleronephthya sp.) and solderfish. Vavuu Atoll, Maldives. Indian Ocean

Juergen Freund / Midnight snapper (Macolor macularis) juvenile swimming towards the camera. Misool, Raja Ampat, West Papua, Indonesia

Sergio Hanquet / Glasseye snapper (Heteropriacanthus cruentatus), headshot. Tenerife, Canary Islands.

David Fleetham / Schooling Black Striped Salema / Snapper (Xenocys jessiae) and Yellowtail Surgeonfish (Prionurus laticlavius). Galapagos Islands, Equador. Three images were stitched to create this panorama.

David Fleetham / School of Black Striped Salema / Snapper (Xenocys jessiae) form a massive spinning ball. Galapagos Islands, Equador.

David Fleetham / Diver / photographer amongst shoal of Black striped salema (Xenocys jassiae), Galapagos Islands, Equador. Model released.

Alex Mustard / Blueline snapper (Lutjanus kasmira) school above Black coral (Antipatharia) in reef. Vavuu Atoll, Maldives. Indian Ocean.

Bert Willaert / Midnight snappers (Macolor macularis), Kimbe Bay, West New Britain, Papua New Guinea

Bert Willaert / Midnight snapper (Macolor macularis) being cleaned by Bluestreak cleaner wrasse (Labroides dimidiatus), Kimbe Bay, West New Britain, Papua New Guinea

Alex Mustard / Large group of Midnight snappers (Macolor macularis) race in to feed on eggs spawned by bohar snappers. Ulong, Rock Islands, Palau, Mirconesia. Tropical west Pacific Ocean

Georgette Douwma / Bigeye snappers (Lutjanus lutjanus) shoal swimming in coral reef including Black coral (Antipathes dichotoma), West Papua, Indonesia.

Doug Perrine / Shortfin mako shark (Isurus oxyrinchus) teeth from upper jaw on display at Oceanographic Museum of Monaco, Principality of Monaco (digitally modified)