Where there was once two there are now 11. They're still really tiny. The Smithsonian's National Zoo is unveiling its 11 new Asian small-clawed otters this Saturday -- one of the largest groupings of this endangered animal in the U.S. These otters, which weigh in at less than 10 pounds, are the smallest and most social otter species in the world. Helpful, too -- the whole family pitches in for child-rearing.