Mark MacEwen / Japanese firefly (Luciola cruciata) light trails at night above stream in rural Japan. June.

Yukihiro Fukuda / Light trails of Japanese fireflies (Hotaria parvula and Luciola cruciata), Nichinan-chou, Tottori, Japan, July, Endemic species.

Alex Hyde / Long exposure of light trail from bioluminescent click beetle (Pyrophorus sp) walking on ground at night. Danum Valley Sabah, Borneo.

Nature Production / Japanese firefly (Luciola cruciata) on leaf at night, with light trails of hundreds of other fireflies in flight in the background, Japan

Yukihiro Fukuda / Japanese fireflies (Luciola cruciata) in flight at night, Japan endemic species, Hino-River, Nichinan-chou, Tottori, Japan, July

Yukihiro Fukuda,Yukihiro Fukuda / Japanese fireflies (Luciola cruciata) in flight at night, endemic species, Yaku-shima UNESCO World Heritage Site, Kagoshima, Japan, May

Juergen Freund / Licuala palms (Licuala ramsayi) with light streaming through the canopy, Daintree, Queensland, Australia

Jack Dykinga / North Rim at Cape Royal with sunset storm light streaming in rays, backlighting the canyon ridges, Grand Canyon National Park, Arizona, USA

Juergen Freund / Light streaming into a shallow cave in a dive site called The Passage, with a diver swimming up towards the foliage visible above. North Raja Ampat, West Papua, Indonesia, February 2010. Model release...

Doug Perrine / Salmon shark (Lamna ditropis) female with mating scar on side and copepod parasites streaming from fins, Port Fidalgo, Prince William Sound, Alaska, USA

Fred Bavendam / Fusilier (Caesio sp) school streaming over a vast field of Disc Coral (Turbinaria reniformis), Manado, Sulawesi, Indonesia

Tony Wu / Water streaming off of a diving Humpback whale's (Megaptera novaeangliae) fluke, with 42ft Nordic Tug Legend visible in the background. Chantham Strait, Alaska, USA.