Adult humpback whales (Megaptera novaeangliae) flukes-up dive in Snow Pass at sunset, Southeast Alaska, United States of America, North America

Adult California gray whale (Eschrictius robustus), near boat in San Ignacio Lagoon, Baja California, Mexico, North America

California gray whale calf (Eschrictius robustus), being touched by tourist in San Ignacio Lagoon, Baja California, Mexico, North America

Whale watchers eye to eye with an inquistive Minke whale (Balaenoptera acutorostrata) associating with their boat. Hebrides, Scotland

Camerman Peter Scoones filming Grey whale (Eschrichtius robustus) underwater with remote camera, San Ignacio lagoon, Baja California, Mexico

Minke whale (Balaenoptera acutorostrata) associating with North Sailing whale-watching boat Husavik, close to the arctic circle at the top of Iceland.

Marine wildlife-watching boat. Encounter with bottlenose dolphins (Tursiops truncatus). Hebrides, Scotland

Whale-watchers leaning over a Minke whale (Balaenoptera acutorostrata), which has stopped and is showing interest in them. Husavik, Iceland

Dolphin watchers being eye balled by two leaping bottlenose dolphin (Tursiops truncatus truncatus) at Chanonry Point. Moray Firth, Scotland

A Bottlenose Dolphin (Tursiops truncatus) surfaces to breathe in front of dolphin watchers standing on the beach at Chanonry Point, Moray Firth, Scotland.

Hector's dolphins (Cephalorhynchus hectori) by swimmer. Akaroa, New Zealand.

Tourist on Bird Island working with resident warden to rescue Green turtle (Chelonia mydas) hatchlings from damaged nests. Seychelles, Indian Ocean (RR)

Humpback whale (Megaptera novaeangliae) fluking up to dive in full view of whale watchers on North Sailing boat. HusavÌk, Iceland

Bottlenose dolphins (Tursiops truncatus truncatus) bowriding a local sailing boat. Moray Firth, Scotland

Group of dolphin watchers relaxing after encounter with some spotted dolphins. Bimini, Bahamas

Humpback whale (Megaptera novaeangliae) with long pectoral fin held out of the water in front of boat full of whale-watchers. HusavÌk, Iceland

Cuttlefish (Sepia officinalis) Two mating head to head within minutes of first encounter. Babbacombe, Torquay, South Devon, UK (RR)

A commercial whale shark encounter with a feeder above on a canoe and a Whale Shark (Rhiniodon typus) below. This is the world's largest species of fish, Oslob, Philippines

A commercial whale shark encounter with a feeder above on a canoe and a Whale Shark (Rhiniodon typus) below. This is the world's largest species of fish, Oslob, Philippines

A commercial whale shark encounter with a feeder above on a canoe and a Whale Shark (Rhiniodon typus) below. This is the world's largest species of fish, Oslob, Philippines