Whales are full of treasures and have important economic value. Its huge body provides people with a large amount of whale meat, whale oil and other products. A blue whale of about 100 tons is worth US$10,000. Whale meat accounts for about half of the whale's weight. In addition to being ground into coarse powder for feed or fertilizer, it can also be eaten by humans after processing. It is rich in protein and has high nutritional value. Food stores in countries such as Norway and Japan offer fresh and canned whale meat. Japanese gourmet researchers believe that whale meat tastes better than beef and is one of the most delicious foods in the world. Japan also uses whale meat as raw material and processes it into artificial fibers. Candles and oil paints can be made from whale blubber. It is also used in the steelmaking and tanning industries. Because the viscosity of whale oil does not change at high temperatures, it is used as a lubricant for some precision instruments. For example, sperm whale oil can be used to refine industrial oil and spermaceti oil. Spermacetic oil is obtained from the brains of sperm whales. It has a high melting point and can be used to make cosmetics and be processed into candles.

In addition, whale skin has a soft texture and smooth surface. It has velvet and patterned leather, suitable for making clothes or bags. Whale fins can be used as umbrellas, bras, bow ties and cigarette cases. The ovaries of whales are also the raw material for progesterone (especially progesterone), a special medicine called "Progestine". Whale guano and bone meal are fertilizers rich in ammonia and phosphorus. Bone glue can also be extracted from whale bones and used as a raw material for processing photographic film. Whale liver is very rich in vitamins A and D. The liver of a sperm whale often weighs 400 kilograms, and its vitamin A content is equivalent to that of 100 tons of high-quality butter or 5 million eggs. Baleen and teeth can be processed into medical equipment or handicrafts.