Baleen- Baleen consists of two horny plates attached to the roof of the whale's mouth. Each plate is made for filtering food.

Barnacles- Marine animals that are cemented to the bodies of larger sea creatures.

Blubber- Fat that lies between the skin and flesh of marine mammals. Blubber acts as a layer of insulation.

Endangered- Very close to becoming extinct.

Extinct- No longer alive or existing.

Harpoon- A hunting weapon developed by the Inupiat. The shaft was made out of walrus ivory or caribou antler.

International Whaling Commission- An international organization founded in 1946 to regulate the whaling industry.

Inupiat- The name given to North Slope Alaskan Inupiat.

Krill- Shrimp-like marine animals that float freely in the ocean.

Mammal- An animal that is warm-blooded, has a backbone, and some form of body hair. The mother nurses her babies.

Migration- Seasonal movements of animals that travel to chosen areas for feeding, breeding, or giving birth.

Muktuk- Whale blubber with skin still attached.

Ooksook- Blubber that is melted down for an oil used in cooking.

Plankton- Marine organisms that are eaten by larger animals.

Pod- A small group of whales that travel together.

Ulu- A shaped tool with a rounded blade, used to separate blubber from the skin.

Umiak- A whaling boat large enough to hold 8 people. It is open and covered with a walrus skin. It also has a wooden frame.

Yupik- Eskimos that live on the western coast of Alaska.