This NOAA Fisheries video features the science we use to recover whales in Alaska. Find out how NOAA scientists use photo identification to identify individual humpback whales and to learn more about population abundance. See how we study what and how much humpback whales eat—research made possible by the success of the Marine Mammal Protection Act, celebrating its 40th anniversary this year.

To see more cool videos, visit the NOAA Fisheries YouTube channel.