Two Worlds: Manatee and Lion Fish(2006)

This planet of ours is Two Worlds: one of land and one of the ocean. This fascinating program explores a pair of marine animals, the manatee and the lion fish, and documents their interactions with each other, as well as with their habitat. We journey to an alien environment where man goes, at his peril, to meet the creatures which make this planet one. This is a feature length documentary edited together from episodes of the inspiring documentary series for physical release.

Official site