The southernmost mammal on Earth. Includes footage of Weddell seal mothers and pups, and underwater footage of seals swimming beneath the sea ice. Interview on location with ecologist Jay Rotella on the population study of Weddell seals in the Erebus Bay area of Antarctica's Ross Sea. This is one of the longest running studies of a long-lived mammal in existence. Video production by Mary Lynn Price. More information at WeddellSealScience.com .