Massive elephant seals go nose to nose to win the title of beach master; giant petrels earn the nickname "murderous garbagemen"; a female humpback goes to extremes to protect her calf from amorous males.

Witness animals struggling with their own kind over the choicest real estate. Learn to fight dirty with a guanaco, head-butt a fellow iguana to claim a piece of prime territory, and meet a hermit crab who forcibly evicts a tenant from its shell.