Humpacks release bubbles underwater to round up small fish into dense schools. They then swim up through the middle and scoop up their prey. Humpback whales are most commonly seen in Alaska during the summer and they are a favorite because of their surprisingly agile acrobatics that bring them out of the water. This is a spectacular feat given the size of the animal - up to 79,000 lbs. Male humpbacks are musically inclined, putting together songs that last 10-20 minutes and are repeated over and over for hours.