Humpback whales were migrating through Alaskan waters during the boat trip I took. So we were on the search for the humpback. Ass different tour boats had sightings, all of the other boats would make a run for it. Eventually, our captain went his own way and we had several sightings. Humpback whales have a boney hump on their back and so are appropriately named. They differ from Gray Whales that are smooth. When we sighted a whale we needed to check for the hump.