What is another word for Family Physeteridae?
Pronunciation: [fˈamɪli fˈa͡ɪstəɹˌɪdiː] (IPA) 
The Family Physeteridae, commonly known as the sperm whale family, is a group of toothed whales that are found worldwide. This family includes four species, including the well-known sperm whale (Physeter macrocephalus). These whales are known for their distinctive block-shaped heads, which contain a cavity filled with a substance called spermaceti. Other members of this family include the pygmy sperm whale (Kogia breviceps), dwarf sperm whale (Kogia sima), and the recently discovered extinct species Livyatan melvillei. While the term "sperm whale family" may be the most commonly used synonym for the family Physeteridae, it is important to note the other species that make up this unique group of marine mammals.
