Alex Mustard / Ruby brittle star (Ophioderma rubicundum) climbing on top of a mountainous star coral (Montastraea faveolata) as it prepares to spawn at night, East End, Grand Cayman, Cayman Islands, British West Ind...

Alex Mustard / Ruby brittle star (Ophioderma rubicundum) climbing on top of a mountainous star coral (Montastraea faveolata) as it prepares to spawn at night, East End, Grand Cayman, Cayman Islands, British West Ind...

Alex Mustard / Mountainous star coral (Montastraea faveolata) spawning at night on a coral reef, showing the synchronous release of bundles of eggs and sperm, East End, Grand Cayman, Cayman Islands, British West Ind...

Alex Mustard / Two images of the same colony of Mountainous star coral (Montastraea faveolata) spawning at night on a coral reef showing the bundles of eggs and sperm before and after the synchronous spawning releas...

Alex Mustard / A Symmeterical brain coral (Pseudodiploria strigosa) spawning at night by releasing pink and white bundles of eggs and sperm from its polyps, East End, Grand Cayman, Cayman Islands, British West Indie...

Alex Mustard / Three Ruby brittlestars (Ophioderma rubicundum) climbing a Symmeterical brain coral (Pseudodiploria strigosa) as it spawns at night in late summer. East End, Grand Cayman, Cayman Islands, British West...

Alex Mustard / A Caribbean reef octopus (Octopus briareus) swimming through spawning Sea rods (Pseudoplexaura) at night, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Close-up of a Black sea rod (Plexaura homomalla) soft coral spawning at night releasing eggs from its polyps, East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Alex Mustard / A Black sea rod (Plexaura homomalla) spawning at night, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Portrait of a Longsnout seahorse (Hippocampus reidi) gripping onto a small Sea rod (Pseudoplexaura) with its prehensile tail, West Bay, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea...

Alex Mustard / Portrait of a Longsnout seahorse (Hippocampus reidi) gripping onto a small Sea rod (Pseudoplexaura) with its prehensile tail, West Bay, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea...

Alex Mustard / Two photos taken one year apart of the same colony of Mountainous star coral (Montastraea faveolata) spawning on both occasions, and recovering from bleaching due to thermal stress, East End, Grand Ca...

Alex Mustard / Portrait of a Beaugregory fish (Stegastes leucostictus) in shallow water, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Roberto Rinaldi / Blue iguana (Cyclura lewisi) portrait, Grand Cayman, Cayman Islands, critically endangered species

Roberto Rinaldi / Blue iguana (Cyclura lewisi) portrait, Grand Cayman, Cayman Islands, critically endangered species

Roberto Rinaldi / Clouded rock iguana (Cyclura nubila) portrait, Cayman Islands, vulnerable species

Roberto Rinaldi / Clouded rock iguana (Cyclura nubila) portrait, Cayman Islands, vulnerable species

Alex Mustard / A school of Caribbean reef squid (Sepioteuthis sepioidea) in mid water over a coral reef. East End, Grand Cayman, Cayman Islands,West Indies. Caribbean Sea.

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 / Southern stingray (Hypanus americanus) female swimming over ripples on a sand bank, photographed with a circular fisheye lens, The Sandbar, Grand Cayman, Cayman Islands, British West Indies, Caribbean...

Alex Mustard / Southern stingray (Hypanus americanus) school swimming in clear shallow water over sand ripples, Grand Cayman, Cayman Islands. British West Indies.

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 / Annual spawning of a massive Starlet coral (Siderastrea siderea) releasing a cloud of gametes at night in late summer, Georgetown, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

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 / Southern stingray (Hypanus americanus) female swimming over a shallow sand bank, North Sound, Grand Cayman, Cayman Islands. British West Indies, Caribbean Sea.

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 / Southern stingray (Hypanus americanus) female swimming over a shallow sand bank, under morning sun, North Sound, Grand Cayman, Cayman Islands. British West Indies, Caribbean Sea.

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 / Sand ripples, The Sandbar, North Sound, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

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 / Diver approaching the wreck of the bow of the USS Kittiwake (US Military submarine rescue vessel) Photograph was taken shortly after the wreck was deliberately sunk as an attraction for scuba divers,...

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 / Diver photographing a large formation of yellow tube sponges (Aplysina fistularis) growing on a coral reef, North Wall, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea. Model released...

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 / Red mangrove trees (Rhizophora mangle) leaves and a seed pod decomposing on the seabed. Mangrove leaves are shed so frequently that an acre of red mangrove will drop about 3 tons a year, North Sound,...

Alex Mustard / Underwater shallow sand bar with ripples, North Sound, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

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 / Diver seen through a porthole of the USS Kittiwake (US Military submarine rescue vessel) Photograph was taken shortly after the wreck was deliberately sunk as an attraction for scuba divers, Caribbea...

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 / Divers on scooters exploring the wreck of the USS Kittiwake (US Military submarine rescue vessel) Photograph was taken shortly after the wreck was deliberately sunk as an attraction for scuba divers,...

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.

Rick Tomlinson / SY "Adele"'s Cayman Island Flag

Alex Mustard / Goliath grouper (Epinephelus itajara) on a rich coral reef with a diver swimming alongside, Bloody Bay Wall, Little Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Great star coral (Montastraea cavernosa) photographed at night under blue light to excite the fluorescence, Little Cayman, Cayman Islands. Bristish West Indies, Caribbean Sea.

Alex Mustard / Boulder star coral (Montastrea annularis) photographed under blue light to excite the fluorescence, Little Cayman, Cayman Islands. British West Indies, Caribbean Sea.

Alex Mustard / Great star coral (Montastrea cavernosa) at night, photographed under blue light to excite the fluorescence, Little Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Great star coral (Montastrea cavernosa) at night, with polyps extended and feeding, photographed under blue light to excite the fluorescence, Little Cayman, Cayman Islands, British West Indies, Caribb...

Alex Mustard / Coral fluorescence photographed at night under blue light to excite the fluorescence, this image is probably a colony of knobby star coral (Solenastea hyades), Little Cayman, Cayman Islands. British W...

Alex Mustard / Boulder star coral (Montastrea annularis) photographed under blue light to excite the green fluorescence, Little Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Diver tickling Nassau grouper (Epinephelus striatus) Bloody Bay Wall, Little Cayman, Cayman Islands. British West Indies, Caribbean Sea. Model released.

Alex Mustard / Mixed hard coral including finger coral (Porites porites) and soft corals growing on reef, Little Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Silver thatch palm tree (Coccothrinax proctorii) silhouette at sunset, Caribbean species is endemic to the Cayman Islands, Little Cayman, Cayman Islands, British West Indies, Caribbean.

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 / Horse eye trevally / jacks (Caranx latus) school with a diver swimming beside the bow of the USS Kittiwake wreck, image was taken shortly after the wreck was deliberately sunk as an attraction for scu...

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 / Frigate bird (Fregata minor) soaring in formation around the moon at sunset, 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 / Stinker sponge (Ircinia felix) close up detail, growing on a coral reef, Georgetown, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

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.