Alex Mustard / Basking shark (Cetorhinus maximus) rear view of shark feeding at the surface on plankton, Cairns Of Coll, Isle of Coll, Inner Hebrides, Scotland, UK, North East Atlantic Ocean, June

Alex Mustard / Basking shark (Cetorhinus maximus) feeding at the surface on plankton, Cairns Of Coll, Isle of Coll, Inner Hebrides, Scotland, UK, North East Atlantic Ocean, June

Alex Mustard / 2020VISION / Common sea urchins (Echinus esculentus) beneath a stand of kelp, Shetland Islands, Scotland, UK, North East Atlantic Ocean, April

Alex Mustard / Circular fisheye photograph of a colourful coral reef with silhouetted diver, East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea. Model released

Alex Mustard / Diver blowing bubble rings, while resting on the sand, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea, January 2011.

Alex Mustard / Schoolmaster snapper (Lutjanus apodus) school, under a coral ledge, Snapper Hole, East End, Grand Cayman, Cayman Islands, Caribbean Sea.

Alex Mustard / Peacock flounder (Bothus lunatus) resting on the seabed, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Sharpnose puffer (Canthigaster rostrata) portrait with the eyes standing out against a dark background, East End, Grand Cayman, Cayman Island, British West Indies, Caribbean Sea.

Alex Mustard / A diver exploring a coral reef with formation of brown tube sponges (Agelas conifera) red rope sponges (Amphimedon compressa) and deepwater sea fans (Iciligorgia nodulifera) East End, Grand Cayman, Ca...

Alex Mustard / Glasseye snapper (Heteropriacanthus cruentatus) head portrait with a cleaning Goby (Gobiosoma genie) East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Yellowhead wrasse (Halichoeres garnoti) male performing a courtship dance to attract females, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

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...

Alex Mustard / 2020VISION / A snorkeller in shallow, sunny waters, Man O War Bay, Jurassic Coast, Dorset, UK, August. Model released.

Alex Mustard / A female Spiny Seahorse (Hippocampus guttulatus) in weeds. Sardina, Gran Canaria, Canary Islands, East Atlantic Ocean, October.

Alex Mustard / View of gills and gill rakers of a Basking shark (Ceterhinus maximus) as it feeds in Cornwall, England. UK, East Atlantic Ocean. June

Alex Mustard / Female Grey seal (Halichoerus grypus) approaching a snorkeller's fins, Lundy Island, Devon, England, UK, North East Altantic Ocean. July 2010. Model released

Alex Mustard / Male Grey seal (Halichoerus grypus) mouths the camera lens, Lundy Island, Devon, England, UK. North East Altantic Ocean. July

Alex Mustard / A young Harbour / Common seal (Phoca vitulina) Lundy Island, Devon, England, UK. Bristol Channel, North East Atlantic Ocean. July

Wild Wonders of Europe / Muñoz / Traigh Ghriais beach, North east Lewis, Outer Hebrides, Scotland, UK, June 2009

Andy Rouse / Aerial view of the wild north east coast of South Georgia, Antarctica, December 2006

Flip Nicklin / Orca (Orcinus orca) adult and breaching calf, southeast Alaska

David Shale / Deepsea fish {Paraliparis sp.) North East, Atlantic Ocean off Cape Verde Islands depth 700-1000m

Robert Thompson / Boyeeghter Strand and Melmore Head, County Donegal, Republic of Ireland, seen from the east cliffs, May 2012

Robert Thompson / Boyeeghter Strand and Melmore Head at sunset, County Donegal, Republic of Ireland, seen from the east cliffs, October 2011

Linda Pitkin / 2020VISION / Blue jellyfish (Cyanea lamarckii), feeding on small plankton, Lundy Island Marine Conservation Zone, Devon, England, UK, May.

Konrad Wothe / Port Stanley, captial of the Falklands; East Falkland, Falkland Islands, South Atlantic Ocean. February 2007.

Alex Mustard / Basking shark (Cetorhinus maximus) feeding at the surface on plankton, Cairns Of Coll, Isle of Coll, Inner Hebrides, Scotland, UK, North East Atlantic Ocean, June

Alex Mustard / Copepods (Calanus finmarchicus) aggregated at the surface (reverse diel migration) providing a food source for Basking sharks, Cairns Of Coll, Isle of Coll, Inner Hebrides, Scotland, UK, North East At...

Alex Mustard / Basking shark (Cetorhinus maximus) feeding at the surface on plankton, Cairns Of Coll, Isle of Coll, Inner Hebrides, Scotland, UK, North East Atlantic Ocean, June

Alex Mustard / Basking shark (Cetorhinus maximus) feeding at the surface on plankton. Note the sea lampreys beneath the tail (Petromyzon marinus) Cairns Of Coll, Isle of Coll, Inner Hebrides, Scotland, UK, North Eas...

David Noton / Dawn over the ocean with palm trees at Bottom Bay, South East Coast, Barbados

Alex Mustard / Secretary blenny (Acanthemblemaria maria) emerging from its tube home in the reef that is covered in a colonial overgrowing Tunicate (Trididemum solidum) East End, Grand Cayman, Cayman Islands, Britis...

Alex Mustard / Cushion sea star (Oreaster reticulatus) high magnification detail of the skin gills used to absorb oxygen from the water between the red knobbly spines, East End, Grand Cayman, Cayman Islands, British...

Alex Mustard / A cooler filled with recently culled invasive lionfish (Pterois volitans). The Indo-Pacific lionfish are an invasive species on Caribbean reefs and free from natural predators thrive at much higher po...

Alex Mustard / Diver catching a Lionfish (Pterois volitans) in collection tube. The Indo-Pacific lionfish are an invasive species on Caribbean reefs and free from natural predators thrive at much higher population d...

Alex Mustard / Roughhead blenny (Acanthemblemaria aspera) male portrait. This species is very small, just 20mm long and 1-2mm deep, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Secretary blenny (Acanthemblemaria maria) peering out from a hole in the reef, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / A cooler containing recently culled invasive Lionfish (Pterois volitans). The Indo-Pacific lionfish are an invasive species on Caribbean reefs and free from natural predators thrive at much higher pop...

Alex Mustard / Triplefin (Enneanectes sp) between the polyps of a great star coral (Montastraea cavernosa) East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Red clingfish (Arcos rubiginosus) pair blend in with their host, a deepwater sea fan (Iciligorgia nodulifera) East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Man wearing glove holding a fillet of a culled invasive lionfish (Pterois volitans). The Indo-Pacific lionfish are an invasive species on Caribbean reefs and free from natural predators thrive at much...

Alex Mustard / Caribbean reef shark (Carcharhinus perezii) with a pair of bar jacks (Caranx ruber) cruises through a school of black durgon (Melichthys niger) above a coral reef, East End, Grand Cayman, Cayman Isla...

Alex Mustard / Trumpetfish (Aulostomus maculatus) hiding amongst the branches of a Porous sea rod (Pseudoplexaura sp) as it hunts for its prey of small fish, East End, Grand Cayman, Cayman Islands, British West Indi...

Alex Mustard / Smooth starlet coral (Siderastrea sidera) close focus wide angle view of a massive colony. This photo is not digital manipulated, but taken with a fisheye lens placed very close to the coral with flas...

Alex Mustard / Golfball coral (Favia fragum) colony showing fluorescent green when photographed under blue light, at night, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Close focus wide angle view of a colony of Great star coral (Montastrea cavernosa). This photo is not digital manipulated, but taken with a fisheye lens placed very close to the coral with flashes aim...

Alex Mustard / Secretary blenny (Acanthemblemaria maria) young peering out of its tube on the surface of a great star coral (Montastraea cavernosa) East End, Grand Cayman, Cayman Islands, British West Indies. Caribb...

Alex Mustard / Spotted scorpionfish (Scorpaena plumieri) waits to ambush prey on top of a boulder on a coral reef, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Brain coral (Pseudodiploria strigosa) poylps capturing a planktonic worm, photographed under blue light to excite the fluorescence. The coral polyps glow green and the worm glows orange. The coral pol...

Alex Mustard / Brain coral (Pseudodiploria strigosa) close focus wide angle view. Photograph is not digital manipulated, but taken with a fisheye lens placed very close to the coral with flashes aimed to illuminate...

Alex Mustard / Diver catching a Lionfish (Pterois volitans) in collection tube. The Indo-Pacific lionfish are an invasive species on Caribbean reefs and free from natural predators thrive at much higher population...

Alex Mustard / Secretary blenny (Acanthemblemaria maria) peering out of a boulder brain coral (Colpophyllia natans) East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Whitefoot shrimp (Periclimenes harringtoni) living with a touch-me-not sponge (Nofibularia nolitangere) East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Alex Mustard / Donkey dung sea cucumber (Holothuria mexicana) lifting its head up from the sand to spawn in late afternoon, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Caribbean spiny lobster (Panulirus argus) sheltering under an overhang on a coral reef, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Herbivorous blue tang (Acanthurus coeruleus) swimming through the rigid branches of a pillar coral (Dendrogyra cylindrus) East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Alex Mustard / Red boring sponge (Cliona delitrix) three excurrent apertures covered in Sponge zoanthids (Parazoanthus parasiticus) East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Sponge brittle star (Ophiactis sp) clambering over a Red boring sponge (Cliona delitrix) covered in Sponge zoanthids (Parazoanthus parasiticus) East End, Grand Cayman, Cayman Islands, British West Ind...

Alex Mustard / Boulder star coral (Montastrea annularis) showing fluorescent green coloration when photographed under only blue light at night to excite the fluorescent pigments in the coral, East End, Grand Cayman,...

Alex Mustard / Secretary blenny (Acanthemblemaria maria) peeking out of a boulder brain coral (Colpophyllia natans) East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Boulder star coral (Montastrea annularis) polyps of a large colony, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / 2020VISION / Fulmar (Fulmarus glacialis) on nest, note its large nostril, Unst, Shetland Islands, Scotland, UK, North East Atlantic Ocean, April

Alex Mustard / 2020VISION / Cliffs, grass, clouds and sky reflected in the smooth surface of the North East Atlantic Ocean, off Lands End, Cornwall, England, UK, January

Alex Mustard / 2020VISION / Skin texture of Common sunstar (Crossaster papposus) Loch Carron, Ross and Cromarty, Scotland, UK, North East Atlantic Ocean, June

Alex Mustard / Roughhead blenny (Acanthemblemaria aspera) high magnification portrait of a golden variety of living in it's tube on a coral reef, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbea...

Alex Mustard / Brown tube sponges (Agelas conifera) formation on reef wall with diver above, image taken with a circular fisheye, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Black sea rod / Caribbean sea whip (Plexaura homomalla) on a shallow reef with sun shing through the water, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Brown tube sponges (Agelas conifera) formation on reef wall, with diver in distance, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Giant barrel sponges (Xestospongia muta) young group on the wall of a coral reef, with diver above in distance, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Brown tube sponges (Agelas conifera) formation on a reef wall, with sun shining through the water and diver above, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / A pair of sponges (Porifera) at the base of a pinnacle off the main reef wall with diver in background, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / A diver and dive boat visible through the canyons of a coral reef, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea, January 2011.

Alex Mustard / Grey angelfish (Pomacanthus arcuatus) pair browsing along the reef between red rope sponges (Aphimedon compressa) with diver above, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbe...

Alex Mustard / A bustling coral reef scene with sponges (Agelas conifera; Amphimedon compressa) soft and hard corals and a school of Creole wrasse (Clepticus parrae) East End, Grand Cayman, Cayman Islands, British W...

Alex Mustard / Brown tube sponges (Agelas conifera) and deepwater sea fans (Iciligorgia nodulifera) with a diver in background exploring the reef, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbe...

Alex Mustard / Grooved brain coral (Diploria labyrinthiformis) close focus wide angle view, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Queen conch (Strombus gigas) crawling over the seabed, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Brain coral (Colpophyllia natans) showing healthy coral, unmanipulated image. East End, Grand Cayman, Cayman Islands. British West Indies. Caribbean Sea.

Alex Mustard / Brain coral (Colpophyllia natans) probably suffering from white band disease, East End, Grand Cayman, Cayman Islands. British West Indies, Caribbean Sea, January 2010.

Alex Mustard / Brain coral (Colpophyllia natans) bleached, polyps have expelled their zooxanthellae symbiotic algae from their tissue, probably as a result of being stressed by a rise in sea temperature, East End,...

Alex Mustard / Red clingfish (Arcos rubiginosus) living on a deepwater sea fan (Iciligorgia nodulifera) on the reef wall, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Smooth trunkfish (Lactophrys triqueter) portrait, above the reef during the day, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Looking up at a dive boat over a shallow reef, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Bluestriped grunt (Haemulon sciurus) school sheltering from the current behind a coral outcrop, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Sailfin blenny (Emblemaria pandionis) male displaying his large dorsal fin, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Yellow tube sponge (Aplysina fistularis) selectively illuminated with a diver swimming above, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Red rope sponge (Amphimedon compressa) on coral reef wall with diver in background, High Rock Drop Off, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Saddled blenny (Malacoctenus triangulatus) close up portrait, showing colour variety from the Cayman Islands with indistinct saddles, East End, Grand Cayman, Cayman Islands, British West Indies, Carib...

Alex Mustard / Secretary blenny (Acanthemblemaria maria) living in a tube within Boulder brain coral (Colpophyllia natans). Photo illuminated with a single flash, with restricted beam to create hard lighting. East E...

Alex Mustard / Stareye hermit crab (Dardanus venosus) in a canyon on a coral reef, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Lamarck's sheet coral (Agaricia lamarcki) close up, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Rock beauty angelfish (Holacanthus tricolor) swimming through a small arch on a colourful coral reef, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Redlip blenny (Ophioblennius atlanticus) perched on top of a coral reef, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.