Espen Bergersen / Sperm whale {Physeter macrocephalus} showint tail fluke as it dives. Photographed just before midnight. 22 nautical miles northwest of Andenes, Northern Norway. July

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 / Sleeping sperm whale, (Physeter macrocephalus) Dominica, Caribbean Sea, Atlantic Ocean.

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

Franco Banfi / Pod of sperm whale socializing, (Physeter macrocephalus), Dominica, Caribbean Sea, Atlantic Ocean.

Franco Banfi / Sperm whale (Physeter macrocephalus) young male trying to copulate with a female. The calf of the female was in the way so the male is trying to chase it away. Dominica.

Mark Carwardine / Sperm whales (Physeter macrocephalus) female group, aerial view. Baja California, Mexico

Tony Wu / Sperm whale (Physeter macrocephalus) mature female, Dominica.

Franco Banfi / Sperm whale (Physeter macrocephalus) pod, Dominica, Caribbean Sea, Atlantic Ocean, January, Vulnerable species.

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

Franco Banfi / Sperm whale (Physeter macrocephalus) tail below water as whale surfaces, Dominica, Caribbean Sea, Atlantic Ocean, Vulnerable species.

Franco Banfi / Sperm whale (Physeter macrocephalus) portrait, with remora fish, Dominica, Caribbean Sea, Atlantic Ocean, Vulnerable.

Franco Banfi / Sperm whale (Physeter macrocephalus) mother surfacing with calf below, Dominica, Caribbean Sea, Atlantic Ocean, Vulnerable species.

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

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 whales (Physeter macrocephalus) large group gathering together, rubbing together to shed skin, interacting and defecating. Indian Ocean, March.

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

Tony Wu / Group of Sperm whales (Physter macrocephalus) family group swimming together, Indian Ocean, March.

Tony Wu / Sperm whale (Physeter macrocephalus) adult female at ocean surface, Indian Ocean, March.

Tony Wu / Family of Sperm whales (Physeter macrocephalus) engaged in social activity, rubbing against each other, Indian Ocean, March.

Tony Wu / Aggregation of Sperm whales (Physeter macrocephalus) engaged in social activity. Indian Ocean, 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.

Solvin Zankl / Sperm whale (Physeter macrocephalus) tail fluke above water during dive, Kaikoura, New Zealand, July, Vulnerable species.

Franco Banfi / Sperm Whale (Physeter macrocephalus) Pico Island, Azores, Portugal, Atlantic Ocean

Philippe Clement / Stranded Sperm whale (Physeter macrocephalus) on beach at Knokke, Belgium, February 2012. No release available.

Nuno Sa / Sperm Whale (Physeter macrocephalus) calf swimming uder its mother. Sao Miguel Island, Azores, July.

Nuno Sa / Sperm Whale (Physeter macrocephalus) group of females with calves. Sao Miguel Island, Azores, July.

Brandon Cole / Sperm Whale (Physeter macrocephalus) and female snorkeler. Dominica, Caribbean Sea. Photo taken under permit. Model released.

Brandon Cole / Sperm Whale (Physeter macrocephalus), playful juvenile with mouth open. Dominica, Caribbean Sea, February.

Brandon Cole / Sperm Whale (Physeter macrocephalus), this playful juvenile is rolling over, showing underside. Note jawline. Dominica, Caribbean Sea, February.

Brandon Cole / Portrait of a Sperm Whale (Physeter macrocephalus). Dominica, Caribbean Sea, February.

Brandon Cole / Sperm Whale (Physeter macrocephalus) raising its tail fluke before a dive. Kiakoura, New Zealand, July.

Brandon Cole / Sperm Whale (Physeter macrocephalus) tail fluke above the surface before diving. Kaikoura, South Island, New Zealand, July.

Doug Perrine / Sperm whale (Physeter macrocephalus) juvenile female aged about 6-11 years, Endangered Species, Commonwealth of Dominica, Caribbean, March

Doug Perrine / Sperm whale (Physeter macrocephalus) juvenile female aged about 6-11 years, Endangered Species, Commonwealth of Dominica, Caribbean, March

Mark Carwardine / Sperm whale (Physeter macrocephalus) fluking, Sea of Cortez, Baja California, Mexico, Endangered

Wild Wonders of Europe / Lundgren / Sperm whales (Physeter macrocephalus) resting, Pico, Azores, Portugal, June 2009

Wild Wonders of Europe / Lundgren / Sperm whale (Physeter macrocephalus) portrait, Pico, Azores, Portugal, June 2009

Wild Wonders of Europe / Lundgren / Sperm whale (Physeter macrocephalus) resting in water, Pico, Azores, Portugal, June 2009. WWE INDOOR EXHIBITION

Wild Wonders of Europe / Lundgren / Sperm whale (Physeter macrocephalus) diving, Pico, Azores, Portugal, June 2009

Wild Wonders of Europe / Lundgren / Sperm whale (Physeter macrocephalus) diving, Pico, Azores, Portugal, June 2009

Wild Wonders of Europe / Lundgren / Sperm whale (Physeter macrocephalus) Pico, Azores, Portugal, June 2009

Luis Quinta / Sperm whale {Physeter macrocephalus} adult and newborn calf, Azores, Atlantic