Alex Mustard / Coral fluorescence (Acropora sp.) at night, photographed under blue light, Raja Ampat, West Papua, Ceram Sea, Pacific Ocean.

Alex Mustard / Coral fluorescence (Acropora sp.) at night, photographed under blue light, Raja Ampat, West Papua, Ceram Sea, Pacific Ocean.

Alex Mustard / Coral fluorescence (Acropora sp.) at night, photographed under blue light, Raja Ampat, West Papua, Ceram Sea, Pacific Ocean.

Solvin Zankl / Scorpion (Pandinus sp.) fluorescing under ultraviolet light.

Adrian Davies / Sulphur tuft fungi (Hypholoma fasciculare) in visible light (top) and fluorescing in UV light (bottom), Surrey, UK.

Adrian Davies / Bowl of fruit in UV light showing mould on Satsuma (Citrus sp.). See 1729463.

Adrian Davies / Minerals in visible light on left and fluorescing in UV light on right. Top: Autunite; Centre: Wernerite; Bottom: Willemite.

Tony Wu / Female Pfeiffer's top shell (Tegula pfeifferi) broadcast spawning, from elevated spot in raised vertical position, by ejecting clusters of green eggs. East China Sea, Kagoshima Prefecture, Japan...

Tony Wu / Veliger, planktonic larva about 5mm, of Oregon hairy triton (Fusitriton oregonensis) in its shell suggesting that it is reaching maturity. Pacific Ocean, Hokkaido, Japan.

Tony Wu / Veliger, planktonic larva about 5mm, of Oregon hairy triton (Fusitriton oregonensis) in its shell, suggesting that it is reaching maturity. Pacific Ocean, Hokkaido, Japan.

Tony Wu / Sequence of veliger, planktonic larva about 5mm, of Oregon hairy triton (Fusitriton oregonensis) emerging from its shell. Pacific Ocean, Hokkaido, Japan. Composite image.

Tony Wu / Female Bivalve mollusc (Bivalvia) of indeterminate species, embedded in coral reef, broadcast spawning orange strands of tiny eggs, with Nagasaki damsel (Pomacentrus nagasakiensis) rushing to feed on...

Tony Wu / Female Bivalve mollusc (Bivalvia) of indeterminate species, embedded in coral reef, broadcast spawning orange strands of tiny eggs, with Nagasaki damsel (Pomacentrus nagasakiensis) rushing to feed on...

Tony Wu / Close-up view of polyps of coral (Alveopora japonica). Sea of Japan, Yamaguchi Prefecture, Japan.

Tony Wu / Close-up view of polyps of coral (Alveopora japonica) with two planulas, larval corals, emerging from coral mouth. Sea of Japan, Yamaguchi Prefecture, Japan.

Tony Wu / Close-up view of polyps of coral (Alveopora japonica) with two planulas, larval corals, emerging from coral mouth. Sea of Japan, Yamaguchi Prefecture, Japan.

Adrian Davies / Shrimp (Carpopenaeus callirostris) fossil in sub-oolitic limestone from Upper Cretaceous period, fluorescing in UV light, Hadjoula, Lebanon.

Adrian Davies / Nepenthes fusca hybrid (Nepenthes N.fusca x N.robcantleyi), Fluorescing under UV light, studio environment.

David Maitland / Deutzia (Deutzia scabra) leaf, microscopic view of blue autofluorescent star-shaped defensive hairs covering the surface, silhouetted against the leaf's red-fluorescent chlorophyll-packed cells, unde...

David Maitland / Margined Ramshorn pond snail (Planorbis planorbis) microscopic view of a galaxy of photosynthetic algae, like Chlamydomonas, living within a slimy biofilm covering the shell. The chlorophyll within t...

David Maitland / Margined ramshorn pond snail (Planorbis planorbis) microscopic view of a galaxy of photosynthetic algae, like Chlamydomonas, living within a slimy biofilm covering the shell. The chlorophyll within t...

David Maitland / Autofluorescence image of a cross section through the tip of the growing leaf-whorl of Pampas grass (Cortaderia selloana) exposed to UV light, the chlorophyll fluoresces red and the lignin blue. The &...

Will Burrard-Lucas / Scorpion (Scorpiones) fluorescing in ultraviolet light at night, Namunyak Wildlife Conservancy, Samburu Game Reserve, Kenya.

Adrian Davies / Mistletoe (Viscum album), a hemiparasite, haustoria entering host plant, shown under UV fluorescence.

Alex Hyde / Soil bacteria and fungi cultured on nutrient agar, imaged under partial ultraviolet lighting showing fluorescence of a Pseudomonas sp. colony in a soil sample from Via Gella Woods, Derbyshire, UK. Mar...

Alex Hyde / Soil bacteria and fungi cultured on nutrient agar and viewed under ultraviolet light, showing fluorescence of Pseudomonas sp. colonies, from a soil sample collected in Via Gellia Woods, Derbyshire.UK....

Gil Wizen / Leaf-mimicking katydid (Cycloptera sp.) displaying UV fluorescence at night in the rainforest, Jatun Sacha Biological Station, Napo province, Amazon basin, Ecuador.

Alex Mustard / Fluorescent coral (Lobophyllia hemprichii) at night on a coral reef in blue light. Laamu Atoll, Maldives, Indian Ocean.

Alex Mustard / Fluorescent coral (Pocillopora sp.) at night on a coral reef in blue light, with the lights from a resort jetty behind, Laamu Atoll, Maldives, Indian Ocean.

Alex Mustard / Fluorescent coral (Diploastrea heliopora) at night on a coral reef in blue light, Laamu Atoll, Maldives, Indian Ocean.

Alex Mustard / Coral fluorescence (Lobophyllia sp.) at night, under blue light, on a coral reef, Laamu Atoll, Maldives, Indian Ocean.

Alex Mustard / Coral fluorescence (Symphyllia sp.) at night, under blue light, on a coral reef, Laamu Atoll, Maldives, Indian Ocean.

Alex Mustard / Coral fluorescence in Mushroom coral (Fungiidae) at night, under blue light, on a coral reef, Laamu Atoll, Maldives, Indian Ocean.

Alex Mustard / Coral fluorescence (Acropora sp.) at night, under blue light, on a coral reef, Laamu Atoll, Maldives, Indian Ocean.

Adrian Davies / Fossil ammonite in a pebble, shown in visible light and ultraviolet fluorescence, with increased detail in UV image. Pebble found at Charmouth, Dorset, UK.

Alex Mustard / Leather corals (Sarcophyton sp.) fluoresce at night under blue light on a coral reef. Laamu Atoll, Maldives. Indian Ocean.

Alex Mustard / Daytime and nightimte photos showing leather coral (Sarcophyton sp.) fluorescence at night under blue light on a coral reef, beneath a resort. Laamu Atoll, Maldives. Indian Ocean.

Doug Perrine / Antler coral (Pocillopora grandis) showing bleaching with pastel green fluorescence. This is believed to result from pigments produced by coral acting as sunscreen in an attempt to survive bleaching....

Doug Perrine / Antler coral (Pocillopora grandis) showing bleaching with pastel green fluorescence. This is believed to result from pigments produced by coral acting as sunscreen in an attempt to survive bleaching....