Massive Steller sea lion Chonkers draws crowds at San Francisco Pier 39

A massive Steller sea lion nicknamed Chonkers has turned San Francisco’s Pier 39 into a daily wildlife spectacle, with tourists and locals gathering along the waterfront to watch the animal lounge among the docks. The attention has built since he was first spotted near Fisherman’s Wharf in early April 2026, and by April 29 the crowd around the pier had grown large enough that the animal was drawing steady online and in-person interest across the Bay Area.

Part of the fascination comes from scale. Steller sea lions are the largest sea lions in the world, and the Marine Mammal Center says males can grow to about 11 feet long and weigh almost 2,500 pounds. Some accounts place Chonkers at about 2,000 pounds, or roughly 10 times the size of the California sea lions that usually dominate Pier 39’s K-Dock. ABC7 reported that he was one of two Steller sea lions visiting the Bay, a rare sight in a place more closely associated with California sea lions.

The animal’s presence has also fed a familiar kind of San Francisco tourism culture, where a living shoreline attraction becomes part of the city’s identity. ABC7 and Pier 39 both set up live webcams so people could watch remotely, extending the spectacle well beyond the promenade itself. The Associated Press said Chonkers was charming tourists and locals alike, a reminder that the city’s working waterfront can also function as a public stage for urban wildlife.

That stage has a long history. Pier 39 says California sea lions first began hauling out on K-Dock shortly after the Loma Prieta earthquake struck San Francisco in October 1989, and by January 1990 they had taken over the dock. The attraction endured because the site offers abundant food and protection from predators, and the colony kept growing. Pier 39 says the sea lion population reached an all-time record of more than 2,100 in May and June 2024.

Chonkers’ popularity also highlights the limits of coexistence. Pier 39 warns that sea lions may bite if provoked and that it is unlawful to feed, handle or harass them. The animal’s size may make him look approachable, but officials still frame the encounter as a protected wildlife experience, not a petting zoo.

The broader conservation backdrop is just as important. NOAA Fisheries lists the western distinct population segment of the Steller sea lion as endangered under the Endangered Species Act, while the eastern distinct population segment was removed from the endangered list in 2013 after recovering. That split underscores why a single oversized sea lion can draw such intense attention at Pier 39: he is not only a crowd-pleaser, but also a reminder that a busy urban waterfront is still part of a much larger marine ecosystem.