PHILADELPHIA ZOO - August 27, 2009 --
Four giant otter pups made their public debut Thursday at the Philadelphia Zoo.They were born on June 21st to parents Banjo and Nina, who are working hard to keep their babies fed, teach them how to swim and how to hold their breath underwater. The babies don't yet have names.
Giant otters are endangered in the wild.
The Philadelphia Zoo is the only zoo in the United States to breed them successfully.