Sea otters cannot even swim on their own when they are born. In the wild, a mother otter takes her pup everywhere to protect and educate her baby.
Allison Argo, the filmmaker behind Frogs: The Thin Green Line, discusses the making of the film in this Web-exlusive video.
Produced by THIRTEEN ©2014 THIRTEEN Productions LLC. All rights reserved.
PBS is a 501(c)(3) not-for-profit organization.