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

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.

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) females socializing, Punta Espinosa, Fernandina Island, Galapagos Islands, Ecuador

Flip Nicklin / Sperm Whale (Physeter macrocephalus) group socializing underwater, Dominica

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

Nick Hawkins / North Atlantic right whales (Eubalaena glacialis) socializing at the surface of the Gulf of Saint Lawrence, Canada. IUCN Status: Endangered. June

Espen Bergersen / Aerial shot of a group of Killer whales (Orcinus orca) socializing, Troms, Norway, August.

Espen Bergersen / Aerial shot of a pod of Killer whales (Orcinus orca) socializing, Troms, Norway, October.

Tony Wu / Smooth-coated otter (Lutrogale perspicillata) with young otters, socializing in the early morning, Kallang River, Singapore

Tony Wu / Atlantic walruses (Odobenus rosmarus) large aggregation socializing late at night in sea, Svalbard, Norway, June

Tony Wu / Atlantic puffins (Fratercula arctica) pair socializing late at night, just before the Arctic summer sunset, Iceland, June