Yep, Humpback (baleen) whales are often sighted, sometimes fairly close to shore off the coats of southern Alaska - tourists on whale watching boats and cruise ships love the famous view of their huge tails often captured on photos as they head back underwater.
We (my husband and I) had one come up right alongside the AK Ferry we were traveling the Inland Passage on a few years back - I saw it out the porthole of our cabin and may have had one of the best views on the boat - it appeared RIGHT outside my window, which was just above the waterline - it seemed only feet away! It was HUGE! Once it had passed by, I raced upstairs to the stern of the boat just in time to see it's tail raise up high out of the water a ways out in the boat's wake before disappearing out of sight.
You surprised me though! I was SURE someone was going to say "Halibut"!
OK ... how about an "I"?