1116-49679 - Snorkelers getting ready to enter the water from a snorkelling tour boat operated out of Maui, Hawaii. They are located next to the backwall of Molokini Crater which is a volcanic tuff cone, Maui, Hawaii, United States of America

1176-1150 - Snorkellers at the entrance to Tomolo (Goa Keramat) cave, Tomolo, Misool, West Papua, Spice Islands, Indonesia, Southeast Asia, Asia

1116-41494 - Slate pencil sea urchins (Heterocentrotus mammillatus) colour the hard coral in this Hawaiian reef scene with three free divers, Molokini Marine Preserve off the island of Maui, Maui, Hawaii, United States of America

1116-41499 - Two women free diving at Molokini Marine Preserve off the island of Maui, Maui, Hawaii, United States of America

1116-40063 - A Reef Manta Ray (Mobula (formerly Manta) alfredi) hovers over a reef cleaning station off the Kona Coast, the Big Island, Hawaii, USA. This particular female manta with a missing left cephalic lobe has been observed by divers and snorkelers at Kona since

846-2902 - Snorkellers amongst rock formations with crystal clear water, Kleftiko, Milos, Cyclades, Aegean Sea, Greek Islands, Greece, Europe

857-95007 - The outline of a snorkeler is seen through bubbles and turbulent currents underwater as waves break onto rocks and reef off Utila Island, Honduras.

1112-3463 - Bull Galapagos sea lion (Zalophus wollebaeki) with snorkeler underwater at Santiago Island, Galapagos, Ecuador, South America

1113-27110 - Snorkeling Rock Islands, Micronesia, Palau

1113-27109 - Snorkeling Rock Islands, Micronesia, Palau

1113-27108 - Snorkeling Rock Islands, Micronesia, Palau

759-6784 - Snorkeling in Rock Islands, Risong Bay, Micronesia, Palau

759-6783 - Snorkeling in Rock Islands, Risong Bay, Micronesia, Palau

759-6603 - Snorkeling Rock Islands, Micronesia, Palau

759-6611 - Snorkeling Rock Islands, Micronesia, Palau

759-6782 - Snorkeling in Rock Islands, Risong Bay, Micronesia, Palau