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DUKAS_08628062_REX
MARINE WILDLIFE
Mandatory Credit: Photo by Len Deeley / SplashdownDirect / Rex Features ( 842313a )
Clownfish (Amphiprion bicinctus), Egyptian Red Sea, in sea anemone tentacles, 03-12-06
MARINE WILDLIFE
(FOTO:DUKAS/REX)
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DUKAS_20406085_REX
Underwater fluorescent photographs by Alex Mustard - 19 Aug 2011
Manadatory Credit: Photo by Alex Mustard/Solent News / Rex Features (1448620a)
Underwater Electric Light Show
These underwater corals look stunning as they emit a fluorescent glow of green, orange and purple.
The colours radiate from the coral in the same way a UV light bounces off bright clothing in a nightclub.
British photographer Alex Mustard, 36, snapped the glowing corals, worms, anemone and crabs while diving in the Red Sea and the Caribbean.
He took the pictures at night and used a standard camera fitted with a blue flash, which triggers the fluorescent reaction.
The exact reason why the corals fluoresce is a mystery but it is thought the fluorescent pigment acts like a sun screen.
Alex, from Southampton, Hants, said: "The Red Sea and the Caribbean both have healthy and rich coral reefs.
"For these types of images you want to photograph where there are lots of species of corals as some glow with fluorescence and some do not.
"What is amazing is that you don't know what you will get until you see the pictures.
"Some corals glow strongly, while others do not.
"It is only when you take the picture and the blue flashes go off that you know if the coral is a performer.
"The pictures are taken with a normal camera and the colours are those that the camera recorded. They are not adjusted on a computer.
"I fitted filters to my flashes so they produce only deep blue light.
"This excites the fluorescence response in the corals, which then give out the greens, oranges and yellows you see in the images.
"The effect is the same as when bright colours in your clothes show up under the UV light in a disco or nightclub."
He added: "Corals are important creatures, which build the reefs that support whole ecosystems.
"They are under threat from rising sea temperatures and increasingly acidic seas.
"But they are not always the most e...
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