Do Sea Otters Have Bellybuttons?

I wish we had more than this question, but we're tired and it's been a long day. We drove 75 miles up the coast to San Francisco on Sunday, had lunch with Elena (Roger's youngest) and her partner Jimmy. We walked through Golden Gate Park and the panhandle. Saw people that were like flashbacks to an earlier era, pierced and tattooed, painted and preened. We drove home with the sun setting on the edge of a magnificent continent. We remembered why love this part of the world.

But the question remains, do sea otters have bellybuttons? I photographed this sea otter on Saturday and had an opportunity to be fairly close to it. When I looked at this photograph, I thought I saw something that looked very bellybutton-like (click on the pic and take a look). What do you think? What we've been really intrigued by, though, is the presence of a gull hanging out very close to the otters. They seem to be waiting around for some inadvertently dropped food, or maybe they clean up whatever morsels have been left behind. We just don't know, and it's only been the past few days that we've noticed this interaction. I guess today we have more questions than answers.