Tony Heald / African elephant trunk used as snorkel while swimming. Chobe NP, Botswana {Loxodonta africana}

Alex Mustard / Post larval Red Sea sailfin tang (Zebrasoma desjardinii), Gubal Island, Egypt. Strait Of Gubal, Gulf of Suez, Red Sea.

David Fleetham / Woman with snorkel equipment walking along water's edge. Kawakiu Nui Beach, West End, Molokai, Hawaii. July 2017. Model released.

Alex Mustard / Freediver explores a coral garden. Sha'ab El Erg, Hurghada, Egypt. Red Sea.

David Fleetham / A couple free diving. Hawaii. June 2006. Model released

Pete Oxford / Researcher Stephen Spear snorkeling in river, looking for Eastern hellbenders (Cryptobranchus alleganiensis). Cooper's Creek, Chattahoochee National Forest, Georgia, USA, July 2014.

Pete Oxford / Researcher Stephen Spear looking at Eastern hellbender (Cryptobranchus alleganiensis) in plastic bag. Cooper's Creek, Chattahoochee National Forest, Georgia, USA, July 2014.

Pete Oxford / Researchers looking for Eastern hellbenders (Cryptobranchus alleganiensis) Hiwassee River, Cherokee National Forest, Tennessee, USA, July 2014.

Richard Du Toit / African Elephant (Loxodonta africana) using trunk like a snorkel, Kruger National Park, South Africa

Jeff Rotman / Threadfin Butterflyfish (Chaetodon auriga) diver observing fish caught in Bedouin gill net, Egypt, Red Sea. Model released. October 2002. Model released.

Inaki Relanzon / Photographer Inaki Relanzon wearing snorkel and mask while photographing Pyrenean brook salamander (Euproctus asper) in stream, Pyrenees mountains, Catalonia, Spain.

Richard Du Toit / African Elephant (Loxodonta africana) using trunk as a snorkel while swimming across Chobe River, Chobe National Park, Botswana