Alex Mustard,Alex Mustard / A diver and a hydrothermal chimney. Note that he is obscured by the different temperature waters (from the chimney and the surrounding water) which are unable to mix. The sea water was 4 degrees Celsi...

Franco Banfi / Scuba diver and yellow sponges (Aplysina cavernicola) on Brioni Steamship wreck, Vis Island, Croatia, Adriatic Sea, Mediterranean. Model released.

Inaki Relanzon / Potholer exploring the Graller del Boixaguer cave, Montsec mountains, Pyrenees, Catalonia, Spain, May 2012. Model released.

Sue Daly / Diver on the wreck of HMNZS Canterbury, Bay of Islands, New Zealand. February 2013. Model released.

Floris van Breugel / A colorful explosion of rocks embedded in three feet of permanent cave ice deep in a lava tube cave (illuminated with a flashlight in the utter darkness.) Lava Beds National Monument, Northern Califor...

Colin Monteath / Campers read in tents lit by flashlight, Cascade Saddle, Mount Aspiring National Park, New Zealand

Fred Bavendam / Flashlight Fish (Anamalops katoptron) school in the hold of a shipwreck at a depth of 30 meters, Manado, North Sulawesi, Indonesia

Norbert Wu / One-fin Flashlight Fish (Photoblepharon palpebratum) light organ under eye used in mating and attracting prey, Grand Comore Island, Indian Ocean

Doug Gimesy / Researcher from platypusSPOT checking fyke net for Platypus (Ornithorhynchus anatinus), part of a river population study for Melbourne Water. Beaconsfield, Melbourne, Victoria, Australia. 2017.

Doug Gimesy / Little penguin (Eudyptula minor) lit in red light by Earthcare St Kilda guide for watching tourists. St Kilda breakwater, Melbourne, Victoria, Australia. September 2016.

David Fleetham / Commerson's frogfish (Antennarius commerson) camouflaged against coral on bow of Alma Jane wreck, diver in background. Off Sabang Beach, Puerto Galera, Mindoro, Philippines. April 2017. Model rele...

David Fleetham / Flashlightfish (Photoblepharon palpebratus) Indonesia.