Alex Mustard / A pair of Australian Sea Lions (Neophoca cinerea) socialising in the shallows. Kangaroo Island, South Australia, Australia. Southern Ocean. November

Juergen Freund / A pig (Sus scrofa domestica) mothering a dog (Canis familiaris). Northern Palawan, Philippines, May 2009.

Juergen Freund / Starfish arm resting on another Starfish, Canada, pacific

Bernard Castelein / Impala {Aepyceros melampus} allogrooming, Samburu NP, Kenya