Alex Mustard / Bengal snapper (Lutjanus bengalensis), Bannerfish (Heniochus diphreutes) and Fusiliers (Caesio sp.) diving towards coral reef to avoid predators. North Ari Atoll, Maldives. Indian Ocean.

Alex Mustard / Oriental sweetlips (Plectorhinchus vittatus) pair. South Ari Atoll, Madlives. Indian Ocean.

Alex Mustard / Tawny nurse shark (Nebrius ferrugineus) group, individuals circling each other at dusk. Vavuu Atoll, Maldives. Indian Ocean.

Alex Mustard / RF - Bannerfish (Heniochus diphreutes) schooling in coral reef. Long exposure. North Male Atoll, Maldives. Indian Ocean. (This image may be licensed either as rights managed or royalty free.)

Jordi Chias / Spotted eagle ray (Aetobatus narinari) school, Kagi kandhu, ;North Male Atoll, Maldives, Indian Ocean.

Jordi Chias / Blue spotted trevally (Caranx bucculentus) hunting small fish in the reef, South Ari Atoll, Maldives, Indian Ocean.

Jordi Chias / Round ribbontail ray (Taeniura meyeni) South Ari Atoll, Maldives. Indian Ocean.

Jordi Chias / Oriental sweetlips (Plectorhinchus vittatus) South Ari Atoll, Maldives, Indian Ocean.

Jordi Chias / Hawksbill turtle (Eretmochelys imbricata) feeding on coral, South Ari Atoll, Maldives Islands, Indian ocean.

Alex Mustard / Wave breaking over the rubble zone close to the reef crest of a coral reef. Baa Atoll, Maldives. Indian Ocean.

Alex Mustard / Maldive anemonefish (Amphiprion nigripes) shoal swimming in the current flowing over a Magnificent sea anemone (Heteractis magnifica). Baa Atoll, Maldives. Indian Ocean.

Alex Mustard / Maldivian anemonefish (Amphiprion nigripes) shelters against a closed magnificent sea anemone (Heteractis magnifica). Male Atoll, Maldives. Indian Ocean.

Pascal Kobeh / Giant clam (Tridacna) on 'Lotus' artificial reef, built in 2001 with a steel frame using mild electric currents to encourage coral growth, with diver in the background. Vabbinfaru Island in North Male...

Pascal Kobeh / 'Lotus', an artificial reef built in 2001 with a steel frame with a mild electrical current which encourages the growth of coral, Ihuru Island, North Male Atoll, Maldives, Indian Ocean. Small reprodu...

Aflo / Whale shark (Rhincodon typus) Maldives.

Michael Pitts / Tracking shot over the bow of a sunken shipwreck, Maldives, Indian Ocean.

Michael Pitts / Schooling bannerfish (Heniochus diphreutes), Maldives, Indian Ocean.

Michael Pitts / Maldives anemonefish (Amphiprion nigripes) and Surgeonfish (Acanthurus) swimming in a strong current, with moving anemones (Actiniaria), Maldives, Indian Ocean.

Michael Pitts / Devil rays (Mobula japonica) viewed from below, South Ari atoll, Maldives.

Alex Mustard / Tawny nurse shark (Nebris ferrungineus) patrols a coral reef at night. Vavuu Atoll, Maldives. Indian Ocean

Alex Mustard / Pair of a Honeycomb moray eels (Gymnothorax favagineus) on a coral reef with triggerfish schooling above. North Male Atoll, Maldives, Indian Ocean.

Alex Mustard / RF - Hawksbill turtle (Eretmochelys imbricata) on coral reef, with Bengal snapper fish (Lutjanus bengalensis) in background. North Ari Atoll, Maldives. Indian Ocean. (This image may be licensed either...

Alex Mustard / Emperor angelfish (Pomacanthus imperator) with Cleaner shrimp (Urocaridella sp.) grooming it. South Ari Atoll, Maldives. Indian Ocean.

Alex Mustard / Star puffer (Arothron stellatus) swimming through Black coral (Antipatharia) in coral reef. Ari Atoll, Maldives. Indian Ocean.

Alex Mustard / RF - Maldive anemonefish (Amphiprion nigripes) swimming above their host Magnificent sea anemone (Heteractis magnifica) on coral reef. Scalefin anthias (Pseudanthias squamipinnis) swimming in backgrou...

Alex Mustard / Flame anthias (Pseudanthias ignitus), male displaying fins whilst courting female. South Ari Atoll, Maldives. Indian Ocean.

Alex Mustard / Sixbar grouper (Cephalopholis sexmaculata) in overhang on a coral reef. South Ari Atoll, Maldives. Indian Ocean.

Alex Mustard / Reef manta (Mobula alfredi) at a cleaning station with Cleaner wrasse (Labroides dimidiatus). South Ari Atoll, Maldives. Indian Ocean.

Alex Mustard / Reef manta (Mobula alfredi) swimming with Remoras (Remora remora). South Ari Atoll, Maldives. Indian Ocean.

Alex Mustard / Blueline snapper (Lutjanus kasmira) school. Vavuu Atoll, Maldives. Indian Ocean.

Alex Mustard / RF - Blueline snapper (Lutjanus kasmira) school. Vavuu Atoll, Maldives. Indian Ocean. (This image may be licensed either as rights managed or royalty free.)

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

Alex Mustard / Blueline snapper (Lutjanus kasmira) school. Vavuu Atoll, Maldives. Indian Ocean.

Alex Mustard / Tawny nurse shark (Nebrius ferrugineus) at night. Vavuu Atoll, Maldives. Indian Ocean.

Alex Mustard / Tawny nurse shark (Nebrius ferrugineus) at night. Vavuu Atoll, Maldives. Indian Ocean.

Alex Mustard / Tawny nurse shark (Nebrius ferrugineus) group at night. Vavuu Atoll, Maldives. Indian Ocean.

Alex Mustard / Brassy chub (Kyphosus vaigiensis) swimming through channel in coral reef at dusk. Alimatha Island, Vavuu Atoll, Maldives. Indian Ocean.

Alex Mustard / RF - Tawny nurse shark (Nebrius ferrugineus) at dusk. Vavuu Atoll, Maldives. Indian Ocean. (This image may be licensed either as rights managed or royalty free.)

Alex Mustard / Spotted eagle ray (Aetobatus narinari), female swimming over coral reef. Individual appears heavily pregnant. South Male Atoll, Maldives. Indian Ocean.

Alex Mustard / Spotted eagle ray (Aetobatus narinari) female swimming over coral reef. South Male Atoll, Maldives. Indian Ocean.

Alex Mustard / Coral grouper (Cephalopholis miniata) male. South Male Atoll, Maldives. Indian Ocean (This image may be licensed either as rights managed or royalty free.)

Alex Mustard / Oriental sweetlips (Plectorhinchus vittatus) schooling above coral reef. Lankan Island, North Male Atoll, Maldives. Indian Ocean.

Alex Mustard / RF - Oriental sweetlips (Plectorhinchus vittatus)l and Redtail butterflyfish (Chaetodon collare) schools in coral reef. Lankan Island, North Male Atoll, Maldives. Indian Ocean. (This image may be lice...

Alex Mustard / Giant moray (Gymnothorax javanicus), Honeycomb moray (Gymnothorax favagineus) and Undulated moray (Gymnothorax undulatus) eels, four emerging from hole in coral reef. North Male Atoll, Maldives. India...

Alex Mustard / Remora (Remora remora) schooling beneath dive boat on a coral reef. North Male Atoll, Maldives. Indian Ocean.

Alex Mustard / Honeycomb moray (Gymnothorax favagineus) on coral reef with Triggerfish (Balistidae) schooling above. North Male Atoll, Maldives. Indian Ocean.

Jordi Chias / Whale shark (Rhincodon typus), south Ari Atoll, Maldives islands

Jordi Chias / Convict surgeonfish (Acanthurus triostegus) Gafu atoll, Indian Ocean, Maldives.