Jordi Chias / Woman snorkeller swimming inside lagoon Toau atoll, Tuamotu Archipelago, French Polynesia, Pacific Ocean.

Angelo Gandolfi / Snorkeller with shoal of Piraputanga (Brycon hilarii), Rio Olha d'Agua at Cabeceira do Prata, Bonito, Mato Grosso do Sul, Brazil

Juergen Freund / Coral reef split level with mangroves with snorkeller, Raja Ampat, West Papua, Indonesia, February 2012 Model released.

Alex Mustard / Whale shark (Rhincodon typus) silhouette of shark feeding on floating fish eggs (not visible) just below the surface in calm weather, with snorkeller taking photos nearby, Isla Mujeres, Quintana Roo,...

Alex Mustard / 2020VISION / Young Grey seal (Halichoerus grypus) playing with snorkeller, Farne Islands, Northumberland, England, UK, July. Model released.

Todd Mintz / Scad fish / Horse mackerel (Trachurus trachurus) shoal with young male snorkeller, Bonaire, Dutch Caribbean. Model released.

Alex Mustard / 2020VISION / A snorkeller in shallow, sunny waters, Man O War Bay, Jurassic Coast, Dorset, UK, August. Model released.

Juergen Freund / Split-level shot of coral reef and island with snorkeller swimming underwater. Misool, Raja Ampat, West Papua, Indonesia, January 2010. Model released.

Alex Mustard / Female Grey seal (Halichoerus grypus) approaching a snorkeller's fins, Lundy Island, Devon, England, UK, North East Altantic Ocean. July 2010. Model released

Alex Mustard / Snorkeller looking down on a Blue whale (Balaenoptera musculus) passing beneath. Indian Ocean, off Sri Lanka.

Alex Mustard / Galapagos sea lion (Zalophus wollebaeki) playing with the fin of snorkeller, Espagnola Island, Galapagos National Park, Galapagos Islands. East Pacific Ocean. Model Released.

Stephane Granzotto / Snorkeller taking pictures of Whale shark (Rhincodon typus) with tracking tag, Tadjourah Gulf, Republic of Djibouti. December, 2017.