Snorkeler, Thailand

Photograph by Nick Kelly, My Shot

Photograph by C.T. Feng, My Shot

Photograph by Michael Nolan, Your Shot

Photograph by Michael Melford, National Geographic

Photograph by Ralph Lee Hopkins, National Geographic

Photograph by Nicki Chen, Your Shot

Photograph by Anton Barmettler, My Shot

Photograph by Dan Desroches, My Shot

Photograph by Anne du Plessis, My Shot

Photograph by Greg Girard, National Geographic