San Francisco's disappearing sea lions

Have you ever been to Fisherman's Wharf in San Francisco? Hundreds of seals bask in the sun there and make a huge racket; it's awesome. But my twin sister, who lives out there, told me that the sea lions have disappeared. They've all just...left. Biologists have no idea why. Some people wonder if an earthquake might be coming (I hope not), but no one really knows. Isn't that bizarre? (Update: They may have ended up in Oregon.)

P.S. My sister and I took this photo-booth shot at Fisherman's Wharf, and we could hear the sea lions barking the whole time.

(Photos by Janet Smith and yosemitewu56)