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.

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) mature female, Dominica.

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.

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.