Remember the Sea Otter pup from the Seattle Aquarium? You can read all about the birth and see pictures in our ZooBorns article from January 16. At that time, the baby was only two days old, having come into the world on January 14. The mother otter, Aniak, and her baby have stayed so close together that the sex of the baby was unknown.

But recently Aniak's pup got her first vet exam. She was weighed and examined while mom stayed near, happily eating some fish, allowing the vet to determine that the baby is a female. See it all in the video below.

Photo Credit: Seattle Aquarium