Wild Wonders of Europe / Lundgre / Sperm whales (Physeter macrocephalus) resting, Pico, Azores, Portugal, June 2009. BOOK & WWE OUTDOOR EXHIBITION.

Mark Brownlow / Sperm whale {Physeter macrocephalus} diving, tail fluke, Kaikoura, South Island, New Zealand

Tony Wu / Sperm whale (Physeter macrocephalus), ten swimming together in gathering of more than 50 individuals. Whales with flatulence and defecating. Sri Lanka.

Franco Banfi / Sperm whales (Physeter macrocephalus) socialising with free diver stopped between two individuals, Dominica, Caribbean Sea, Atlantic Ocean, January, Vulnerable species. Model released.

Espen Bergersen / Sperm whale (Physeter macrocephalus) tail fluke visible as whale dives. outside Andoya, Norway March

Franco Banfi / Sperm whale (Physeter macrocephalus) with mouth open, Dominica, Caribbean Sea, Atlantic Ocean. Vulnerable species.

Franco Banfi / Mother with young calf Sperm whale (Physeter macrocephalus) Dominica, Caribbean Sea, Atlantic Ocean.

Tony Wu / Swimmer stroking 'Scar', a male Sperm whale (Physeter macrocephalus) who often seems to seek out and enjoy contact with people. Caribbean, January 2010. Model released.

Tony Wu / Four Sperm whales (Physeter macrocephalus) rubbing their heads together while socializing, forming an X shape pattern. Caribbean.

Tony Wu / Four Sperm whales (Physeter macrocephalus) rubbing their heads together while socializing, hanging down. Caribbean.

Tony Wu / Sperm whale (Physeter macrocephalus) female at the ocean surface with her mouth open. This whale has just surfaced from foraging in deep water. Ogasawara or Bonin Islands, Japan.

Tony Wu / Sperm whale (Physeter macrocephalus) adult female swimming upwards to surface with other behind. Indian Ocean, March.