Michel Roggo / Underwater landscape with turbulent water in mountain creek, Motélon, Gruyères, Fribourg, Swiss Alps, Switzerland, March

Michel Roggo / Underwater landscape with turbulent water in mountain creek, Fribourg, Swiss Alps, Switzerland, March

Michel Roggo / Underwater landscape with turbulent water in mountain creek, Fribourg, Swiss Alps, Switzerland, April

Michel Roggo / Underwater landscape in Bua, Gaula river tributary, Norway, July

Michel Roggo / Underwater landscape in Verzasca River, Ticino, Switzerland, September

Michel Roggo / Underwater landscape in Verzasca River, Ticino, Switzerland, September

Michel Roggo / Underwater landscape with turbulence around rocks in shallow water, Verzasca river, Ticino, Switzerland, November

Michel Roggo / Underwater landscape in Verzasca River, Ticino, Switzerland, September

Michel Roggo / Underwater landscape with turbulence around rocks in shallow water, Verzasca river, Ticino, Switzerland, November

Michel Roggo / Underwater landscape with turbulence around rocks in shallow water, Verzasca river, Ticino, Switzerland, November

Michel Roggo / Underwater landscape with ice, Sense river, Fribourg, Switzerland, January

Michel Roggo / Underwater landscape in pool under waterfall in Mountain creek, Saane river tributary, Switzerland, April

Michel Roggo / Underwater landscape in Maggia river, Tessin, Switzerland, September

Michel Roggo / Underwater landscape in Verzasca River, Ticino, Switzerland, September

Michel Roggo / Underwater landscape with ice, Sense river, Fribourg, Switzerland, January

Michel Roggo / Underwater landscape in pool under waterfall in Mountain creek, Saane river tributary, Switzerland, April

Michel Roggo / Underwater landscape beneath waterfall, Baca River, Slovenia, June

Michel Roggo / Underwater landscape looking up at bubbles in ice, Doubs River, France, February

Michel Roggo / Underwater landscape beneath waterfall, Sandøla, Norway, July

Michel Roggo / Underwater river landscape, New Zealand, February

Michel Roggo / Underwater landscape beneath ice in Aare river tributary, Canton of Berne, Switzerland, January

Stephen Dalton / Common frog (Rana temporaria) tadpoles hatching from frogspawn, UK

Jeff Rotman / Large group of Californian sealions (Zalophus californianus) swimming and playing underwater, Anacapa Island, California, Pacific Ocean

Jeff Rotman / Scuba diver exploring underwater cave entrance, Sinai, Egypt, Red Sea Model released Model released.

Jeff Rotman / Free diver diving to explore blue water beside coral reef, Sinai, Egypt, Red Sea Model released Model released.

Jeff Rotman / Free diver diving to explore coral reef, Sinai, Egypt, Red Sea Model released Model released.

Nick Upton / Lance fly (Dasiops sp. possibly Dasiops spatiosus) 'bubbling' regurgitated stomach contents in order to increase the concentration of its food by evaporating excessive water content, Wiltshire, UK,...

Edwin Giesbers / Air bubbles trapped in ice, the Netherlands

Edwin Giesbers / Air bubbles trapped below the surface of an ice covered body of water, with grass below, the Netherlands

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) male pursuing and blowing bubbles to attract female, in team-based mating behav ior, Maui, Hawaii - notice must accompany publication; photo obtained under NMFS...

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) male blowing bubbles to attract female in foreground, in team-based mating beha vior, Maui, Hawaii - notice must accompany publication; photo obtained under NMF...

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) female courted by cooperating causesd bubbles by slapping surface with pectoral fin, Maui, Hawaii - notice must accompany publication; photo obtained under NMFS...

Stephen Dalton / Common frog (Rana temporaria) tadpoles recently hatched from spawn, UK

Laurie Campbell / Detail of air bubbles in ice, Berwickshire, Scotland, December

Stephen Dalton / European water spider {Argyroneta aquatica} underwater in air bubble bell, UK, Argyronetidae

Stephen Dalton / European water spider {Argyroneta aquatica} underwater in air bubble bell, UK, Argyronetidae

Stephen Dalton / European water spider {Argyroneta aquatica} underwater with its diving bell bubble of air, UK, Argyrometidae

Wild Wonders of Europe / Lundgren / Annika Blomberg diving amongst seaweed, Saltstraumen, Bodö, Norway, October 2008 (Model released)

Jerry Monkman / "The Bubbles" and Jordan Pond in Acadia National Park, Maine, USA, July 2008

Pete Oxford / Streamer / Mexican hogfish (Bodianus diplotaenia) off Wolf Island, Galapagos Islands

Andy Rouse / Galapagos sealion (Zalophus californianus wollebaeki) swimming upside-down underwater, blowing bubbles, Galapagos

Andy Rouse / Galapagos Sealion (Zalophus californianus wollebaeki) underwater blowing bubbles, Galapagos

Doug Perrine / White marlin {Tetrapturus albidus} off Isla Mujeres, streaming bubbles from swiping at bait on surface, off Yucatan Peninsula, Mexico, Caribbean Sea

Wild Wonders of Europe / Lundgren / Turbulence in the Orkla River, Norway, September 2008

Doug Perrine / Striped marlin {Tetrapturus audax} brings down a cloud of bubbles after striking a Sardine with its bill at the surface, while feeding on baitball of Sardines / Pilchards {Sardinops sagax} off Baja Ca...

Shattil & Rozinski / Bubbles of air caught in pond ice, Colorado, USA

Jerry Monkman / Jordan Pond at Sunset, Acadia National Park, Maine, USA. "The Bubbles" are in the distance.

Jerry Monkman / Kayaks on the shore of Jordan Pond with "The Bubbles" in the background, Arcadia NP, Maine, USA

Jerry Monkman / Cross country skiing on the Carriage Roads next to Jordan Pond and the Bubbles, Acadia NP, Maine, USA

Jane Burton / Bubbles of air streaming over the water surface of a fish tank for a fast flowing sandy river from Papua New Guinea.

Jane Burton / Various species of tropical fish in fish tank with plants and airlift, captive.

Tim Laman / Californian sea lion {Zalophus californianus} exhaling air bubbles, amongst Giant kelp forest, off Santa Barbara, California, USA, July

Eric Baccega / Canadian otter (Lutra canadensis) diving, British Columbia, Canada

Kim Taylor / Phantom Midge (Chaoborus crystallinus) larva hangs motionless in the water with the aid of air bubbles fore and aft, maintaining its body in the horizontal position. Surrey, UK

Yva Momatiuk & John Eastcott / Humpback Whale (Megaptera novaeangliae) feeding underwater by blowing bubbles to concentrate and disorient school of krill or small fish, Cape Evensen, Antarctica

Yva Momatiuk & John Eastcott / Humpback Whale (Megaptera novaeangliae) feeding underwater by blowing bubbles to concentrate and disorient school of krill or small fish, Cape Evensen, Antarctica

Yva Momatiuk & John Eastcott / Humpback Whale (Megaptera novaeangliae) feeding underwater by blowing bubbles to concentrate and disorient school of krill or small fish, Cape Evensen, Antarctica

Yva Momatiuk & John Eastcott / Humpback Whale (Megaptera novaeangliae) feeding underwater by blowing bubbles to concentrate and disorient school of krill or small fish, Cape Evensen, Antarctica

Juergen Freund / Christmas Island red crab {Gecarcoidea natalis} bubbling, indicative of stress, Christmas Is, Indian Ocean

Juergen Freund / Christmas Island red crab {Gecarcoidea natalis} bubbling, indicative of stress, Christmas Is, Indian Ocean

Ross Hoddinott / Ice patterns and air bubbles, Dartmoor, Devon. UK

Doug Perrine / False killer whale ( Pseudorca crassidens ) with mouth open, showing large conical teeth, and exhaling a bubble blast from blowhole, captive, aquarium, from Indo-pacific, digitally manipulated

Graham Eaton / Male Mallard {Anas platyrhynchos} feeding underwater, Wales, UK

Nature Production / Siamese Fighting Fish {Betta splendens} making a foam nest of bubbles to attract female to lay eggs in, captive

Pete Oxford / Galapagos sealion (Zalophus wollebaeki) underwater breathing out air bubbles, Gardner Bay, Española (Hood) Island, Galapagos Islands, South America

Pete Oxford / Galapagos sealion (Zalophus wollebaeki) underwater breathing out air bubbles, Gardner Bay, Española (Hood) Island, Galapagos Islands, South America

Pete Oxford / Galapagos sealion (Zalophus wollebaeki) underwater breathing air bubbles, Gardner Bay, Española (Hood) Island, Galapagos Islands, South America

Barry Bland / Bottlenosed dolphin {Tursiops truncatus}breathing out just below surface Bay of Biscay, Atlantic Ocean.

Pete Oxford / Galapagos sealion (Zalophus wollebaeki) underwater breathing out air bubbles, Gardner Bay, Española (Hood) Island, Galapagos Islands, South America

Juergen Freund / Stressed Christmas Island red crab bubbling at mouth (Gecarcoidea natalis) Indian Ocean, Australia

Pete Oxford / Jacare caiman bellowing (subsonic boom communication) (Caiman crocodilus yacare) Pantanal, Brazil

Michael Durham / Townsend's Big-eared Bat (Corynorhinus townsendii) exits a cave in the Derrick Cave Complex, a series of lava tubes and lava bubbles, central Oregon

Michael Durham / Townsend's Big-eared Bat (Corynorhinus townsendii) pair exit a cave while a third flies in the background in the Derrick Cave Complex, a series of lava tubes and lava bubbles, dusk, central Oregon

Michael Durham / Townsend's Big-eared Bat (Corynorhinus townsendii) exits a cave in the Derrick Cave complex, a series of lava tubes and lava bubbles, dusk, central Oregon

Michael Durham / Townsend's Big-eared Bat (Corynorhinus townsendii) exits a cave in the Derrick Cave Complex, a series of lava tubes and lava bubbles, central Oregon

Michael Durham / Townsend's Big-eared Bat (Corynorhinus townsendii) exits a cave in the Derrick Cave Complex, a series of lava tubes and lava bubbles, central Oregon

Willem Kolvoort / Freshwater algae of the Periphyton producing oxygen bubbles that ascend to the pond surface. Lake Naarden, Holland

Willem Kolvoort / Underwater (Algae) meadow, little peatbog lake, Holland. The Algae produce oxygen but the bubbles cannot escape from the hairy mass of the algae and pull the algae bed upwards, causing the strange al...

Willem Kolvoort / Underwater view of Algae with oxygen bubbles they produce, Lake Naarden, Holland

Willem Kolvoort / Oxygen bubbles on strand of submerged reed, sand-winning pit, Holland

Willem Kolvoort / Underwater (Algae) meadow, little peatbog lake, Holland. The Algae produce oxygen but the bubbles cannot escape from the hairy mass of the algae and pull the algae bed upwards, causing the strange al...

Willem Kolvoort / Sunlight above underwater (Algae) meadow, sand winning pit, Holland. The Algae produce oxygen but the bubbles cannot escape from the hairy mass of the algae and pull the algae bed upwards, causing th...

Willem Kolvoort / Water beetle (Acilius sulcatus) on Canadian waterweed (Elodea canadensis), beetle has an air bubble under his back-shield, sand winning pit, Holland

Willem Kolvoort / Oxygen bubbles on strand of algae on submerged branch, sand-winning pit, Holland

Willem Kolvoort / European water spider (Argyroneta aquatica) underwater in air bubble in garden pond, Holland

Willem Kolvoort / Underwater (Algae) meadow, sand winning pit, Holland. The Algae produce oxygen but the bubbles cannot escape from the hairy mass of the algae and pull the algae bed upwards, causing the strange float...

Willem Kolvoort / Underwater Stonewort covered with (Algae) and oxygen bubbles, little peatbog lake, Holland.

Willem Kolvoort / Abstract view of air bubbles underneath ice, Holland

Willem Kolvoort / Underwater (Algae) meadow, little peatbog lake, Holland. The Algae produce oxygen but the bubbles cannot escape from the hairy mass of the algae and pull the algae bed upwards, causing the strange al...

Willem Kolvoort / Moss animals / Bryozoans (Cristatella mucedo) colonies consisting of 200- 500 polypides creep over stone which is covered with perifyton and oxygen bubbles, sand-winning pit, Holland

Tui De Roy / Gray Whale (Eschrichtius robustus) adult underwater trailing bubbles, Magdalena Bay, Baja California, Mexico

Tui De Roy / Gray Whale (Eschrichtius robustus) adult underwater blowing bubbles, Magdalena Bay, Baja California, Mexico

Steven David Miller / Snorkler at entrance to Devil Cave system, head of Ginnie springs, Florida, USA

Paul Johnson / Gas bubbling up from gas pool, Soos Nature Reserve, Czech Republic

Duncan Mcewan / Grass and air bubbles trapped in ice, Scotland, UK

Juergen Freund / Sand bubbles created by little Sand Bubbler Crabs {Scopimera inflata} as they feed off microscopic material between the sand grains, Queensland, Australia