A waxy substance called ambergris, which is from a sperm whale's digestive system, was used in making perfume. In fact, ambergris was very valuable, and a large lump found by a beachgoer was worth a fortune. Since 1986, there has been a temporary ban on hunting the large whales for commercial uses. This is controversial, because the products from these whales are still used commercially. Many scientists question whether the whales really need to be killed to learn the sorts of things being studied.
Many people are concerned about the fate of the small whales, the dolphins and porpoises.
Thousands die every year from getting caught in fishing nets and plastic trash. Toxins and pollution in the ocean could be affecting the health of these animals and their ability to fight off diseases. Around the world, there has been an increase in reported strandings of marine mammals. Other species are suffering due to loss of their habitat. Sometimes, even whalewatching can interfere with and harrass whales, if the boats venture too close to the whales or separate mothers from calves.