San Francisco’s famed Fisherman’s Wharf district is seeing a surge in sea lions. They’re lounging, biting each other and generally making a ruckus in numbers not seen in more than a decade. First appearing at Pier 39 after the 1989 earthquake, the sea lions have become a well-known tourist attraction. The number of sea lions crashing at the pier fluctuates over the seasons. On most days more than a hundred can be seen. But this week, Pier 39 has counted more than one thousand sea lions, the most they’ve seen there in 15 years.