Watch Humpback Whales for Free: How to Stream the Movie Online at 123Movies. . Humpback Whales takes audiences to Alaska, Hawaii and the Kingdom of Tonga for a close-up look at how these whales communicate, sing, feed, play and take care of their young. Humpbacks were nearly driven to extinction 50 years ago, but today are making a steady recovery. Join a team of researchers as they explore what makes humpbacks the most acrobatic of all whales, why only the males sing, and why these intelligent 50-foot, 48-ton animals migrate more than 6,000 miles round-trip every year.