Alex Mustard / Male Speckled sandperch (Parapercis hexophthalma) hunting for invertebrate food on the sand next to coral reef. Small Crack, Sha'ab Mahmud, Sinai, Egypt. Red Sea.

Alex Mustard / Black grouper (Mycteroperca bonaci) hovering above a Bahamian coral reef, Little Bahama Bank, The Bahamas, Caribbean Sea.

GEORGETTE DOUWMA / Spinecheek anemonefish (Premnas biaculeatus) amongst tentacles of its exclusive host, the Bubble tip anemone (Entacmaea quadricolor) Raja Ampat, West Papua, Indonesia.

David Hall / Caribbean trumpetfish in coral. (Aulostomus maculatus) Cayman Is

Peter Scoones / Blackbar Soldierfish group (Myripristis jacobus) Bonaire, Netherlands Antilles, Caribbean photographed during making of BBC Planet Earth series 2005

Juergen Freund / Potato grouper (Epinephelus tukula), Rowley Shoals, Western Australia

Georgette Douwma / Clown anemonefish (Amphiprion percula) amongst tentacles of a blue variety of anemone (Stichodactyla gigantea) Raja Ampat, West Papua, Indonesia.

Georgette Douwma / Shoal of pygmy sweepers (Parapriacanthus ransonetti), Andaman Sea, Thailand

Franco Banfi / Reef under the surface of shallow waters, at sunset, covered with hard corals, Brush Coral (Acropora hyacinthus) Robust Acropora (Acropora robusta) and other Acropora, Maldives, Indian Ocean

Alex Mustard / Portrait of Masked butterflyfish (Chaetodon semilarvatus), swimming next to coral reef. Endemic to Red Sea. Malahi, Fury Shoal, Egypt.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonneti) with soft corals (Dendronephthya sp) Egypt, Red Sea.

Michael Pitts / Spotted moray eels {Gymnothorax moringua} amongst soft coral

Aflo / Black-Saddle leatherjacket (Paraluteres prionurus) in coral reef, Maldives, Indian Ocean. October.

Alex Mustard / Smaller female Coral grouper (Cephalopholis miniata) flashes her submissive lighter colouration at larger, darker male. Jackson Reef, Strait of Tiran, Sinai, Egypt. Gulf of Aqaba, Red Sea.

Georgette Douwma / Longnose hawkfish in Seafan coral {Oxycirrhites typus} Sulawesi, Indonesia

Claudio Contreras / French Angelfish (Pomacanthus paru) with a Smallmouth Grunt (Haemulon chrysargyreum) and Blade Fire Coral (Millepora complanata). Cancun National Park, Caribbean Sea, Mexico.

Georgette Douwma / Coral hind (Cephalopholis miniata) lying in ambush under table coral on reef. Andaman Sea, Thailand.

Georgette Douwma / False clown anemonefish {Amphiprion ocellaris} in anemone. Digital Composite, Andaman sea

Georgette Douwma / Emperor angelfish (Pomacanthus imperator) with Lyretail anthias / Goldies (Pseudanthias squamipinnis). Red Sea, Egypt (Digital composite)

Tim Laman / Striped triplefin (Helcogramma striatum) resting on sponge on coral reef, Bali, Indonesia.

Michele Westmorland / Small goby (Eviota sp) on hard coral (Turbinaria frondens) House Reef at the Jetty, Tufi, Oro Province, Papua New Guinea

Georgette Douwma / Pink anemonefish (Amphiprion perideraion) in host anemone. Papua New Guinea.

Georgette Douwma / Emperor angelfish (Pomacanthus imperator). Red Sea, Egypt.

Alex Mustard / Shortnose batfish (Ogcocephalus nasutus) resting on the sandy seabed, West Palm Beach, Gulf Stream, West Atlantic Ocean, Florida, USA.

Georgette Douwma / Elongate surgeonfish (Acanthurus mata) at a cleaning station with Bluestreak cleaner wrasses and sweepers in the background. Andaman Sea, Thailand

Jeff Rotman / Giant seafan coral {Subergorgia hicksoni} and Anthias fish on reef, Red Sea

Alex Mustard / Pederson cleaner shrimp (Periclimenes pedersoni) hovering above a coral reef, beating its antennae, hoping to attract a fish to clean. This shrimp is carrying eggs. Bloody Bay Wall, Little Cayman, Cay...

Alex Mustard / Nassau grouper (Epinephelus striatus) swimming through gorgonians on a coral reef. Bloody Bay Wall, Little Cayman, Cayman Islands. Caribbean Sea.

Alex Mustard / Scalefin anthias (Pseudanthias squamipinnis) male swimming in open water above a coral reef. Ras Katy. Sharm El Skeikh, Sinai, Egypt. Gulf of Aqaba, Red Sea.

Alex Mustard / Colourful reef scene with soft corals (Dendronephthya sp.) and Scalefin anthias (Pseudanthias squamipinnis). Ra Province, Viti Levu, Fiji, Polynesia. Bligh Waters, Vatu-i-Ra Passage, Tropical South Pa...

Doug Perrine / Wrasse blenny {Hemiemblemaria simulus} in giant brain coral, Bahamas, mimics cleaning wrasse

Alex Mustard / Long exposure of a Midnight snapper (Macolor macularis) swimming over a coral reef. Rock Islands, Palau, Micronesia. Tropical west Pacific Ocean

Constantinos Petrinos / Orange banded coralfish {Coradion chrysozonus} Sulawesi, Indonesia

Alex Mustard / Andaman anemone fishes (Amphiprion ephippium) hovering above a sea anemone on a coral reef in Thailand. Richelieu Rock, Andaman Sea, Indian Ocean.

Alex Mustard / School of Bohar snappers (Lutjanus bohar) above a coral reef. These fish are usually solitary but have gathered in the summer in the Red Sea for spawning. Shark Reef, Ras Mohammed Marine Park, Sinai,...

Alex Mustard / A Caribbean reef shark (Carcharhinus perezi) above corals and sponges on a reef. Grand Bahama, Bahamas.

Georgette Douwma / Coral reef landscape. Shallow reef with Anthias and wave. Red Sea, Egypt, North-Africa

Alex Mustard / Secretary blenny (Acanthemblemaria maria) making a home in a deserved worm tube of a great star coral (Montastraea cavernosa), East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Se...

Jeff Rotman / Klunziger's wrasse (Thalassoma klunzigeri) in soft coral, Red Sea. Egypt.

Alex Mustard / Grey angelfish (Pomacanthus arcuatus) portrait, Georgetown, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / A male Yellow-headed jawfish (Opistognathus aurifrons) blowing out a clutch of eggs he has been incubating in his mouth in order to oxygenate them, East End, Grand Cayman, Cayman Islands, British West...

Juergen Freund / True clownfish / Clown anemonefish (Amphiprion percula) amongst tentacles of anemone on reef, West New Britain, Papua New Guinea.

Juergen Freund / Yellow-margined / Yellow edged moray eel (Gymnothorax flavimarginatus) in a sponge. Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonneti) Egypt, Red Sea.

Georgette Douwma / Red Sea anemonefish (Amphiprion bicinctus) in anemone. Egypt, Red Sea.

Juergen Freund / True clownfish / Clown anemonefish (Amphiprion percula) tending their eggs. Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Pufferfish (Diodon hystix) Great Barrier Reef, Queensland, Australia

Juergen Freund / Coral reef landscape with Damselfish, Misool, Raja Ampat, West Papua, Indonesia.

Georgette Douwma / Picasso triggerfish (Rhinecanthus assasi) swimming over coral reef. Egypt, Red Sea.

Juergen Freund / Many spotted sweetlips (Plectorhinchus chaetodonoides) and other fish under table coral on a healthy coral reef, Komodo NP, Indonesia, Indo-pacific.

Jeff Rotman / Close-up of skin of Bicolor parrotfish {Cetoscarus bicolor} Red Sea

Juergen Freund / Leaf scorpionfish (Taenianotus triacanthus) camouflaged on coral reef, Kimbe Bay, West New Britain, Papua New Guinea.

Georgette Douwma / Big-eye or Goggle-eye (Priacanthus hamrur) on coral reef. Egypt, Red Sea.

Juergen Freund / Thousands of Anthias / Fairy basslets on colourful coral reef, Anilao, Batangas, Philippines, March 2010.

JEFF FOOTT / Split level view of Black tip reef shark {Carcharhinus melanopterus}, French Polynesia

Juergen Freund / Spot-face moray eel (Gymnothorax fimbriatus) in coral reef crevice being cleaned by Banded coral shrimps (Stenopus hispidus) West New Britain, Papua New Guinea.

Juergen Freund / Juvenile Barramundi cod (Cromileptes altivelis). Lembeh Strait, Sulawesi, Indonesia

Georgette Douwma / Long jawed / Sabre squirrelfish (Sargocentron spiniferum) pair over coral reef, Maldives, Indian Ocean

Juergen Freund / True clownfish / Clown anemonefish (Amphiprion percula) tending its eggs. Misool, Raja Ampat, West Papua, Indonesia0

Juergen Freund / Variegated / Common lizardfish (Synodus variegatus) portrait. North Raja Ampat, West Papua, Indonesia

Juergen Freund / Sergeant major damselfish (Abudefduf vaigiensis) at the house reef of Miniloc Island Resort, El Nido Island, Palawan, Philippines, May 2009. These fish gather in a dense mass when bread is thrown into...

Juergen Freund / Blue striped / Blue lined fangblenny (Plagiotremus rhinorhynchos). Misool, Raja Ampat, West Papua, Indonesia

Juergen Freund / Face of a Common lionfish (Pterios volitans) on top of the reef. Lembeh Strait, North Sulawesi, Indonesia

Pete Oxford / Goldentail moray (Gymnothorax miliaris)~Bonaire, Netherlands Antilles, Caribbean

Juergen Freund / School of Yellow line scads (Selaroides leptolepis). Misool, Raja Ampat, West Papua, Indonesia

Jeff Rotman / Poisonous Bluespotted ribbontail stingray (Taeniura lymma) swimming over coral reef, Red Sea, Egypt

Juergen Freund / Lunar tailed rock cod / Coronation grouper (Variola louti) swimming fast over coral reef, Bali, Indonesia

Juergen Freund / Orange striped triggerfish (Balistapus undulatus) hunting over coral reef, Bali, Indonesia.

Juergen Freund / Pygmy seahorse (Hippocampus bargibanti) camouflaged in a fancoral. Misool, Raja Ampat, West Papua, Indonesia

Juergen Freund / Close-up of the fin and flank of an Emperor angelfish (Pomacanthus imperator). Misool, Raja Ampat, West Papua, Indonesia

Juergen Freund / Denise's pygmy seahorse (Hippocampus denise) in its fan coral. Misool, Raja Ampat, West Papua, Indonesia,

Juergen Freund / Six-banded Angelfish (Pomacanthus sexstriatus) detail of tail. Misool, Raja Ampat, West Papua, Indonesia,

Juergen Freund / Diver amongst Sergeant major damselfish (Abudefduf vaigiensis) house reef of Miniloc Island Resort, El Nido, Palawan, Philippines. These fish come together densely when bread is thrown into the water...

GEORGETTE DOUWMA / Beaked / Copper-banded butterflyfish (Chelmon rostratus) in coral reef, Indonesia

Juergen Freund / Sergeant major damselfish (Abudefduf vaigiensis), Parrotfish and Wrasses in the house reef of Miniloc Island Resort, El Nido, Palawan, Philippines. These fish come together densely when bread is throw...

GEORGETTE DOUWMA / Coral hind (Cephalopholis miniata) and Lyretail anthias (Pseudanthias squammipinnis) on coral reef, Egypt, Red Sea

Juergen Freund / Yellow Shortfin lionfish (Dendrochirus brachypterus) face. Lembeh Strait, Sulawesi, Indonesia

Juergen Freund / Blue striped blenny (Plagiotremus rhinorhynchus) hiding on coral reef in worm hole, Indo-pacific

Juergen Freund / True clownfish / Clown anemonefish (Amphiprion percula) hiding among the tentacles of a sea anemone. Lembeh Strait, North Sulawesi, Indonesia

Juergen Freund / Schooling Banggai cardinalfish in anemone tentacles. (Pterapogon kaudemi). Lembeh Strait, North Sulawesi, Indonesia

GEORGETTE DOUWMA / Black-tail dascyllus (Dascyllus melanurus) amongst Blue coral (Heliopora coerulea). Raja ampat, West Papua, Indonesia

Juergen Freund / Whitemargin stargazer (Uranoscopus sulphureus) half hidden in the sand. Lembeh Strait, North Sulawesi, Indonesia

Alex Mustard / Schoolmaster snapper (Lutjanus apodus) above a coral reef, Georgetown, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Tim Laman / Giant Kelp forest {Macrocystis pyrifera} with Garibaldi fish (Hypsypops rubicundus). Small island off Santa Barbara, California, USA, July 2001.

Alex Mustard / Sand diver (Synodus intermedius) portrait on a coral reef, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Busy coral reef community feeding on plankton, with Scalefin anthias (Pseudanthias squamipinnis), Soft corals (Dendronephthya sp.) and Fire corals (Millepora dichotoma), making up classic Red Sea scen...

Alex Mustard / Yellow tube sponge (Aplysina fistularis) top view of tubes with water swirling around them, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Tim Laman / Anthias fish and hard corals on a Fiji reef. Primarily Lyretail Anthias (Pseudanthias squamipinnis).~~Vatu-i-Ra, Fiji. Oct 03

Cheryl-Samantha Owen / Blacktip reef sharks (Carcharhinus melanopterus) swimming in shallow crystal clear water, Aldabra Atoll, Seychelles, Indian Ocean

GEORGETTE DOUWMA / Freckled hawkfish {Paracirrhites forsteri} at reef, showing colour differentiaion on upper and lower part of body, Red Sea, Egypt

Georgette Douwma / Yellowbar angelfish (Pomacanthus maculosus) swimming over coral reef with soft corals. Egypt, Red Sea.

Dan Burton / Freckled hawkfish {Paracirrhites forsteri} amongst coral, Red Sea