text: A sea otter mother hold her pup on her stomach as she rests floating on her back. This pup, just a few days old, probably weighs between 3 and 5 pounds. The pup still has the fluffy fur it was born with, which traps so much fur the pup cannot dive and floats like a cork, Enhydra lutris, Elkhorn Slough National Estuarine Research Reserve, Moss Landing, California