Editing Zalophus (section)

===Reproduction===
Unlike fur seals (''[[Arctocephalus]]'') which live in well-structured social groups, the species of the genus ''Zalophus'' form variable groups lacking in organization, although the males are also territorial and usually form [[harem (zoology)|harems]] of about fifteen females each. Males make loud sounds to mark territory. They usually [[mating|mate]] between May and January depending on the species. Females give birth to only one young, which is born on land or water after a gestation that lasts between 342 and 365 days. They are the only mammals whose milk does not contain lactose. Females wean their young after 11 to 12 months, but some nurse their one-year-old pups alongside their newborns.
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File:Galápagos sea lions Isabela.jpg| A pair of Galápagos sea lions (Zalophus wollebaeki) on Isabela Island, Galapagos Islands. Photographed in the early morning.
File:Californian Sea Lions (16141829839).jpg| California Sea lions at Santa Cruz, California
File:Zalophus californianus swimming past fish, Guadalupe Island, Mexico (14917375665).jpg| California Sea lions (''Zalophus californianus'') swimming past fish, Guadalupe Island, Mexico
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