Adult humpback whales are just over 50 ft and weigh 80,000 lbs. They are popular with whale watchers for their acrobatics. Migrating some 16,000 miles each year, the Humpback diet is mostly krill. They like visiting the Broken Group when the herring come in to spawn. Humpbacks live from 50 to 100 years. Their eerie underwater song can last 20 minutes. Humpbacks are most commonly seen in the middle of Barkley Sound, especially around the Broken Group.