San Francisco- A man swimming in the buff along the shoreline is causing a stir where tourists stroll along the waterfront and dine in restaurants overlooking San Francisco Bay.

The skinny-dipper has shocked diners and prompted complaints to police.

“He makes fly-bys,” City Manager Dana Whitson said. “Usually, people look for seals. Some of the diners are kind of surprised.”

Sausalito police Detective William Fraass said the department has received at least two reports in the past three weeks of a man swimming au naturel in the afternoon near the Spinnaker restaurant and Schoonmaker Point Marina. “It is a rarity. It is just another call for service but it made our eyebrows go up when we heard the call over the radio,” Fraass said. “We don’t get many naked-people-swiming-in-the-bay calls.”

Police have unsuccessfully attempted to catch the swimmer bare-bottomed.

“We are still looking because we want to talk to him and see what is going on,” Fraass said. “We want to inform him of the calls from the public and get his side of the story. Right now, no laws have been broken, but we are still investigating.”