Sea Lions

More than 1,000 sea lions gathered at San Francisco's Pier 39 last week, marking the largest congregation of the marine mammals at the city's Fisherman's Wharf in about 15 years.

More Than 1,000 Sea Lions Gather at San Francisco's Pier 39, the Largest Group in 15 Years

The pinnipeds came to the area to feed on anchovies and herring as they prepare for breeding season

An elephant seal pup on South Georgia Island

Why Did Seals and Sea Lions Never Commit to a Life Fully at Sea?

While whales moved from living on land to an existence immersed in water, pinnipeds embraced an amphibious lifestyle

Sea lions breed and give birth at Point La Jolla in San Diego.

San Diego Closes Popular Beach for Seven Years to Protect Sea Lions

Visitors have been getting too close to the marine mammals—taking selfies and even harassing them—as they rear their pups

A sea lion receiving care at the Pacific Marine Mammal Center in Laguna Beach, California, shows signs of domoic acid poisoning.

Algae Is Making Sea Lions More Aggressive in California

A toxin present in algal blooms is moving through the food chain, leading to the deaths of sea lions and dolphins

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