If you’ve walked near Pier 39 lately, you’ve probably heard the sound of a snapping oak tree echoing across the water. That isn’t construction. It’s 2,000 pounds of Steller sea lion hitting a wooden dock with the grace of a falling refrigerator.
The internet has dubbed him Chonkers, and he’s currently the biggest celebrity in San Francisco. While the city usually deals with tech drama or political infighting, everyone has collectively decided to obsess over a marine mammal that looks like a Volkswagen Beetle covered in fur. He’s massive. He’s loud. And frankly, he’s making the local California sea lions look like kittens.
The guest who won't leave
Most sea lions at Pier 39 are California sea lions. They’re social, barky, and weigh maybe 800 pounds on a heavy day. Chonkers is a Steller sea lion (Eumetopias jubatus). These guys are usually found way up north near Alaska or the rugged coast of Washington. Seeing one in the Bay is like seeing a grizzly bear walk into a cat cafe.
He showed up around mid-March 2026 and hasn't left. Experts at the Marine Mammal Center think he’s here for the buffet. It’s currently anchovy season, and the Bay is essentially an all-you-can-eat bar for a 2,000-pound predator. Why swim back to the cold North when you can lounge in the sun and eat your weight in herring every afternoon?
Why everyone is obsessed with him
People love a spectacle, and Chonkers provides one every time he moves. When he decides he wants a spot on a specific float, he doesn't ask. He just launches. Videos going viral on TikTok and Reddit show him "hauling out"—the technical term for climbing onto land—and sending half a dozen smaller sea lions flying into the water like bowling pins.
It’s not just the size. It's the vibe. He’s thigmotactic, which is a fancy way of saying he likes to snuggle. Despite being three times the size of his peers, he spends his mornings trying to cuddle with the smaller California sea lions for warmth. It’s a hilarious, slightly dangerous-looking pile of blubber that has tourists lining up before 10 AM just to get a photo.
How to tell it's actually Chonkers
Don't get fooled by some "regular" big sea lion. If you’re looking for the real deal, check for these traits:
- The Size: He is significantly longer and wider than anything else on the dock. Think 10 to 11 feet long.
- The Color: Stellers are lighter, often a tan or yellowish-brown, compared to the chocolate brown of California sea lions.
- The Sound: He doesn't really bark like a dog. He growls and roars. It’s a deeper, more guttural sound that vibrates in your chest.
The science of the big guy
Steller sea lions are actually on the rebound. For decades, they were listed as endangered, specifically the Western population. Chonkers belongs to the Eastern population, which has seen numbers stabilize and even grow. Seeing him in San Francisco isn't just a fluke; it's a sign that the local ecosystem is healthy enough to support a top-tier apex predator.
The Farallon Islands, just 30 miles off the Golden Gate, are a major breeding ground for his species. While most Stellers stay out there in the rougher, wilder water, some—like our boy here—decide the marina life is more their speed. Harbormaster Sheila Chandor noted that while they see Stellers every few years, they rarely stick around this long. Chonkers is officially a "resident" at this point.
Don't be that tourist
Look, I get it. You want the selfie. But don't be stupid. These docks weren't built for 2,000-pound animals, and they certainly weren't built for you to get close to them.
- Keep your distance: Even on the viewing platforms, stay behind the rails. A Steller sea lion can move faster than you think when it’s motivated by a stray fish or annoyance.
- Go early: Chonkers is a morning person. He’s usually visible at K-Dock before 10 AM. By lunch, he’s often out in the Bay hunting.
- Check the cam: Pier 39 has a live webcam. If you don't want to trek down there and find an empty dock, check the feed first.
What happens when he leaves
Eventually, the anchovies will thin out or the call of the North will get too loud to ignore. Chonkers will leave. When he does, the floats at Pier 39 will probably sit a few inches higher in the water. Until then, he’s a reminder that San Francisco is still a wild place, even if the "wild" part currently weighs a ton and sleeps 16 hours a day on a piece of plywood.
If you’re heading down this weekend, bring binoculars. You don't need them to see him—he’s hard to miss—but you’ll want them to see the look on the smaller sea lions' faces when he decides to sit on them. It’s the best free show in the city.
